When moving across a period from left to right in the periodic table, excluding transition elements, which trend occurs?(1 point)
Valence electrons increase by one.
Valence electrons decrease by one.
The energy levels increase by one.
The energy levels decrease by one.
Answers
Answer:
Valence electrons increase by one
The 'Periodic Table' is characterized as the 'tabular representation of chemical elements as per their atomic number in order to keep the elements possessing similar properties in a single group.'
In case one moves towards right from left in this table except for the transition elements, the trend that occurs would be:
A). Valence electrons increase by one.
'Valence electrons' are described as 'any of the electrons that are present in an atom's outermost shell.' These are the electrons that possess the ability to develop bonds with other present atoms. The valence electrons present increase by one unit to maximum of 4 units in the period if we move from the left towards the right leading to an enhanced charge on the nucleus.Thus, option A is the correct answer.
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Related Questions
qua thí nghiệm về đoạn mạch gồm 2 điện trở háy ghi lại kết quả )giúp mik với(
Answers
Answer:
I don't think this is the right question
Astronomers have observed a small, massive object at the center of our milky way galaxy. A ring of material orbits this massive object; the ring has a diameter of about 15 light years and an orbital speed of about 200 km/s.
Answers
Astronomers have indeed observed a small, massive object at the center of our Milky Way galaxy. This object is surrounded by a ring of material that has a diameter of approximately 15 light years and an orbital speed of roughly 200 km/s.
This small, massive object is known as Sagittarius A* (pronounced "A-star"). It is a supermassive black hole with a mass of about 4 million times that of our sun. The ring of material that orbits Sagittarius A* is called the circumnuclear disk, and it is made up of gas and dust that is being pulled in by the black hole's strong gravitational forces.
The circumnuclear disk is located within the larger structure of the Milky Way called the galactic center. This region is extremely dense and chaotic, with many stars and gas clouds interacting with each other. Sagittarius A* is located at the very center of the galactic center, and its powerful gravitational pull shapes the behavior of the stars and gas around it.
Overall, the observation of a small, massive object at the center of our Milky Way galaxy is an exciting discovery that tells us a lot about the behavior of stars, gas, and black holes in the universe. By studying the behavior of Sagittarius A* and its surroundings, astronomers can gain valuable insights into how galaxies form and evolve over time.
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. Sunita is taking a train to Madurai. Her train has stopped at Trichinapally. She is facing the direction the train will be moving in . She can see a train next to her. The train is also going to Madurai and it leaves first. As the other train leaves, it seems to Sunita as if
Answers
The relative motion of the train next to her is the motion of the other train in her rest frame.
As the other train leaves, it seems to Sunita as if her train is moving backwards
Reason:
The motion of the train Sunita is taking is given by the rate of movement of
objects outside the train from the front side of the train towards the back
side of the train, that way she can tell that the train is moving.
The motion of the other train from the rear side of the train from the rear
side of the train to the front side is a reverse motion to what Sunita
observes when the train is moving forward. Therefore, as the other train
leaves, it seems to Sunita as if her train is moving backwards.
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If a body of mass 4 kg moves at a velocity of 25 m/s and has a completely inelastic collision with a body of mass 10 kg, the final velocities of both the bodies is 14 m/s. Calculate the initial velocity of the body of mass 10 kg.
Answers
We are given the following information about an inelastic collision.
Mass of 1st object = 4 kg
Mass of 2nd object = 10 kg
Initial velocity of 1st object = 25 m/s
Final velocity of both objects = 14 m/s
Initial velocity of 2nd object = ?
In an inelastic collision, the momentum is conserved but the kinetic energy is not conserved.
Recall that the total momentum is conserved and given by
\(m_1u_1+m_2u_2=(m_1+m_2)v_2\)Let us substitute the given values and solve for initial velocity of the body (u2)
\(\begin{gathered} m_1u_1+m_2u_2=(m_1+m_2)v_2 \\ 4\cdot25+10\cdot u_2=(4+10)\cdot14 \\ 100+10\cdot u_2=196 \\ 10\cdot u_2=196-100 \\ 10\cdot u_2=96 \\ u_2=\frac{96}{10} \\ u_2=9.6\; \frac{m}{s} \end{gathered}\)Therefore, the initial velocity of the body of mass 10 kg is 9.6 m/s
3 Which organisms survive well on volcanic islands?
1. bacteria
2. birds
3. plants
4. large animals
Answers
plants
i hope its right and have a nice day
Answer:
number 1
Explanation:
Which type of error is a false positive
Answers
Answer: Type I Error
5. Whether you are standing, running or jumping Earth is exerting a gravitational force on you. This gravitational force is called an object's weight (W). Knowing this you can find the weight of an object if you know the mass because the acceleration will be 9.8 m/s2 due to gravities pull on the object. The equation to use then is: W = mass x acceleration. What is the weight of a 53 kg man?
Answers
Answer:
How we know, the equation is:
W = mg
Replacing according our data:
W = 53 kg × 9,8 m/s^2
Resolving:
W = 519,4 N
The weight of the object is of 519,4 Newtons.
force can change the ____________ and _______________ of an object
Answers
Answer:
Force can change the speed and direction of an object.
Explanation:
Which statement best describes reactance in a series RLC circuit?
A. Capacitive reactance is always dominant.
B. Inductive reactance is always dominant.
C. Resistance is always dominant.
D. The larger of the two reactances is dominant.
Answers
The reactance in a series RLC (Resistor-Inductor-Capacitor) circuit depends on the frequency of the AC source and the values of the circuit components. Therefore, none of the options accurately describe reactance in a series RLC circuit.
The capacitive reactance and inductive reactance are equal at the resonant frequency, and both can be dominant depending on the frequency of the AC source. At lower frequencies, inductive reactance dominates, while at higher frequencies, capacitive reactance dominates.
The resistance always has a constant value, independent of frequency. However, at resonance, the reactance is zero, and the resistance is dominant.
Therefore, the correct answer is none of the above.
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how does a particle differ from its anti-particle? it has opposite mass. it has opposite charge. its wave-function is the opposite sign. all of the above none of the above
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An antiparticle is a subatomic particle that, by definition, has the same mass as its normal particle counterpart but the opposite magnetic moment and electric charge. An electron's antiparticle, for instance, is the positron.
The mass of an antiparticle is equal to that of the particle version, but it has the opposite charge. Antiparticles have opposite charges, baryon numbers, lepton numbers, and strangeness. A subatomic particle known as an antiparticle has the same mass as a particle of regular matter but the opposite electric charge and magnetic moment. Thus, the positron (a positively charged electron) is the opposite of the negatively charged electron.
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Force=mass x acceleration which of newtons laws does this best describe
Answers
What he said
what is the net charge on a sphere that has the following? (a) 5.03 106 electrons and 8.51 106 protons c (b) 245 electrons and 119 protons
Answers
(a) The net charge on the sphere is -3.48 * \(10^6\).
(b) The net charge on the sphere is +126. The net charge represents the overall charge imbalance on the sphere and determines its electrical behavior.
To calculate the net charge on the spheres, we subtract the number of protons from the number of electrons.
(a) Sphere with 5.03 *\(10^6\) electrons and 8.51 * \(10^6\) protons:
Net charge = Number of electrons - Number of protons
Net charge = 5.03 * \(10^6 - 8.51 * 10^6\)
Net charge = -3.48 * \(10^6\)
Therefore, the net charge on the sphere is -3.48 * \(10^6\).
(b) Sphere with 245 electrons and 119 protons:
Net charge = Number of electrons - Number of protons
Net charge = 245 - 119
Net charge = 126
Therefore, the net charge on the sphere is +126.
In summary, the net charge on the sphere in case (a) is -3.48 * 10^6 and in case (b) is +126.
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What ionic compound would bond in a 1 to 2 ratio?
Answers
An ionic compound that would bond in a 1:2 ratio would be one in which the cation has a charge of 2+ and the anion has a charge of 1-. This is because the total charge of the compound must be neutral.
An ionic compound is a type of chemical compound that is formed through the transfer of electrons between atoms. In an ionic compound, one or more positively charged ions (known as cations) are attracted to one or more negatively charged ions (known as anions) to form a stable structure. The cations and anions are held together by electrostatic forces known as ionic bonds.
Ionic compounds typically have high melting and boiling points, are usually crystalline solids at room temperature, and are often soluble in water. They can conduct electricity when dissolved in water or when melted, but not when in a solid state. Ionic compounds have a wide range of applications, including as building blocks for ceramics, in the production of batteries, and as components of various chemical processes. Examples of common ionic compounds include sodium chloride (table salt), calcium carbonate (chalk), and potassium iodide (used in medicine).
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A​ town's January high temperatures average 34°F
with a standard deviation of 8°​,
while in July the mean high temperature is 72°
and the standard deviation is 7 degrees. In which month is it more unusual to have a day with a high temperature of 54°​? Explain.
Answers
To determine in which month it is more unusual to have a day with a high temperature of 54°F, we need to calculate the z-scores for this temperature in both January and July and compare them.
The z-score for a temperature of 54°F in January is:
z = (54 - 34) / 8 = 2.5
The z-score for a temperature of 54°F in July is:
z = (54 - 72) / 7 = -2.57
Since the absolute value of the z-score in January (2.5) is greater than the absolute value of the z-score in July (2.57), we can conclude that it is more unusual to have a day with a high temperature of 54°F in January.
This is because the z-score represents the number of standard deviations a data point is from the mean, and a z-score of 2.5 in January indicates that the temperature of 54°F is very far from the average January high temperature of 34°F. On the other hand, a z-score of -2.57 in July indicates that a temperature of 54°F is still within the range of temperatures typically seen in July, which has a much higher mean high temperature of 72°F.
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A 150- branch in a circuit must be reduced to 93 . A resistor will be added to this branch of the circuit to make this change. What value of resistance should be used and how must the resistor be connected
Answers
The value of resistance that should be used is 244.74 Ohms and the resistor must be connected in parallel.
Given the following data:
Initial resistance, R₁ = 150 Ohms.Final resistance, R₂ = 93 Ohms.What is a parallel circuit?A parallel circuit can be defined as an electrical circuit with the same potential difference (voltage) across its terminals.
In order to determine the magnitude of a resistor that should be added to this branch of the circuit, the electrical circuit would be connected as a parallel circuit.
Next, the total effective resistance of this electrical circuit is given by:
RT = (R₁ × R₂)/(R₁ - R₂)
RT = (150 × 93)/(150 - 93)
RT = 13950/57
RT = 244.74 Ohms.
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A well lagged bar of 100cm has its end maintained at 90°C and 50°C respectively what is the temperature at a point 50cm from the hotter end.
Answers
help please!! I'm pretty sure the answer is E.
Answers
Answer:
The answer is indeed E, 4K1.
Explanation:
When the block is compressed a distance x from equilibrium, the spring exerts a restoring force on the block given by Hooke's law:
F = -kx
where k is the spring constant. The negative sign indicates that the force is in the opposite direction to the displacement.
As the block is released, this restoring force accelerates the block to the right. At any point during the motion, the total mechanical energy (kinetic plus potential) of the system is conserved. Initially, all the energy is potential energy stored in the compressed spring. At the point when the block separates from the spring, all the potential energy has been converted into kinetic energy. Therefore, we have:
K = (1/2)mv1^2 = (1/2)kx^2
where v1 is the speed of the block when it separates from the spring.
When the block is compressed a distance 2x, the spring exerts a restoring force given by:
F = -2kx
This force is twice as large as the force when the block was compressed a distance x. Therefore, the block will experience twice the acceleration and reach twice the speed when it separates from the spring. The kinetic energy of the block at this point is given by:
K' = (1/2)mv2^2 = (1/2)k(2x)^2 = 4kx^2
where v2 is the speed of the block when it separates from the spring after being compressed a distance 2x.
So the ratio of the kinetic energies when the block is released from compressions of distance x and 2x respectively is:
K'/K = 4kx^2 / (1/2)kx^2 = 8
Therefore, the kinetic energy of the block when it separates from the spring after being compressed a distance 2x is 8 times the kinetic energy when it is compressed a distance x, i.e., K' = 8K. So the answer is E, 4K1
Where is the high-voltage battery pack usually located in hybrid vehicles? A. in the engine compartment. B. in the trunk. C. near the back seats
Answers
The high-voltage battery pack in hybrid vehicles is usually located:
Option C. near the back seats
What are hybrid vehicle batteries for?They are responsible for the operation of the vehicle in electric mode. They are recharged by the combustion engine or by regenerative braking.
In hybrid vehicles, the high-voltage battery pack is usually located near the back seats. This is done for several reasons, including weight distribution and heat management. By placing the battery pack near the back seats, the weight of the battery pack is distributed more evenly throughout the vehicle, which helps to improve the vehicle's handling and performance.
Additionally, by keeping the battery pack away from the heat of the engine compartment, the battery pack is less likely to be damaged or to experience reduced performance due to heat.
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A. It Implies That M Is Finitely Generated. B. It Implies That M Has Nonzero Elements Of Nonzero Order. C. When Every Non-Null Element Has Null . D. In The Case That The Ring R Is A Body. E. None Of The Above Alternatives Gives A
Which of the following alternatives give a true statement. Justify your answer.
A modulus M over a ring R has a finite basis:
a. It implies that M is finitely generated.
b. It implies that M has nonzero elements of nonzero order.
C. When every non-null element has null .
d. in the case that the ring R is a body.
e. None of the above alternatives gives a true statement.
Which of the following statements are true?
a. If a subset of a module generates that whole module, then the subset cannot be
empty.
b. Every submodule S of a module M verifies the inequality C. Two different subsets of M have to generate two different submodules of M.
d. If S generates a submodule N of the module M, then contains S.
e. Neither statement is true.
Answers
The correct answer is e. None of the above alternatives gives a true statement. None of the statements in options a, b, c, and d are true when it comes to a modulus M over a ring R having a finite basis.
When a modulus M can be formed entirely from a finite set of elements, the modulus M is said to be finitely generated. M's finite basis does not, however, automatically imply that M is finitely generated. A basis is a set of linearly independent elements, and it might not be enough to produce all of the components of the modulus.
According to the assertion in option b, M must include nonzero items of nonzero order if it has a finite basis. This is untrue, though. The smallest positive number k, such that the element raised to the power of k equals the identity element, is referred to as the order of an element.
According to option c, every non-null element in a modulus with a finite basis has a null. Nevertheless, this claim is likewise untrue. It is possible for a modulus with a finite basis to have non-null elements without a null element.
According to option d, a ring R is a body, or a field, and only then can a modulus have a finite basis. However, this assertion is also untrue. Even though the ring R is not a field, a modulus can nonetheless have a finite basis. None of the given alternatives provides a true statement about a modulus M over a ring R having a finite basis.
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Which is a characteristic of the electron Sea model for Metallic bonding
Answers
Answer:
In metallic bonds, the valence electrons from the s and p orbitals of the interacting metal atoms delocalize. That is to say, instead of orbiting their respective metal atoms, they form a “sea” of electrons that surrounds the positively charged atomic nuclei of the interacting metal ions.
Explanation:
Answer:
Electrons flow easily between metal nuclei :)
Explanation:
A plane flies from New York to LA at a constant speed of 800 km an hour how long will it take the plane to fly to 4,200 kilometers
Answers
Answer:
3.5 hours
Explanation:
When an electron is removed from a neutral atom, it becomes....
A) A positive ion
B) a negative ion
C) heavier
D) a bipolar atom
Answers
Answer:
A
Explanation:
Nuclei decay from a more stable form to a less stable form.Question 9 options:TrueFalse
Answers
ANSWER
False.
EXPLANATION
In radioactive decay (or nuclei decay), an unstable nucleus emits radiation into a nucleus that is table and has less energy and a lower mass.
Therefore, nuclei decay from a less stable form to a more stable form.
The answer is false.
The driver of a car traveling at 38.7 m/s applies the brakes and undergoes a constant
deceleration of 2.41 m/s. How many revolutions does each tire make
before the car comes to a stop, assuming that
the car does not skid and the tires have
radii of 0.18 m?
Answer in units of rev.
Answers
Each tire makes 274.9 revolutions before the car comes to a stop.
How to calculate?We will calculate the distance covered for by the car after the brakes are applied. We will apply the following equation of motion:
V^2=U² +2as where V is the final velocity, U is the initial velocity, a is the acceleration and s is the distance covered during that acceleration.
0=(38.7)² -2* 2.41 *S (This negative because it is decelerating).
0 = 1497.69 - 4.82* S
S = 310.72
Circumference of the tire = 2πr where r is the radius.
Circumference = 1.13
Distance / circumference = Number of revolutions.
Number of revolutions. =310.72 / 1.13
Number of revolutions = 274.9
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A 2 kg object with a weight of 20 N is being pulled up by a rope with a tension of 12N what is the acceleration of the object
Answers
Answer:
The object accelerates downward at 4 m/s² since the tension on the rope is less than weight of the object.
Explanation:
Given;
mass of the object, m = 2 kg
weigh of the object, W = 20 N
tension on the rope, T = 12 N
The acceleration of the object is calculated by applying Newton's second law of motion as follows;
T = F + W
T = ma + W
ma = T - W
\(a = \frac{T-W}{m} \\\\a = \frac{12 - 20}{2} \\\\a = -4 \ m/s^2\) (the negative sign indicates deceleration of the object)
The object accelerates downward at 4 m/s² since the tension on the rope is less than weight of the object.
when a human cannon ball shoots in the air for 9 seconds, she travels 37 meters before ut lands. Caculate the speed
Answers
Answer:
9.1 mph
Explanation:
In a coordinate system in which the direction to the right is positive, what are the distance
and displacement of a person who walks 35meters to the left, 18meters to the right, and then
26meters to the left?
Answers
Answer:
The distance is \(d = 79 \ m \)
The displacement is 43 m to the left
Explanation:
Generally the distance is mathematically represented as
\(d = a + b + c \)
substituting 35 meters for b, 18 meters for a and 26 meters for c
So
\(d = 35 + 18 + 26 \)
\(d = 79 \ m \)
In the question we are going to assume the left direction is negative while right direction is positive
Generally the displacement is mathematically represented as
\(D = x + y + z\)
substituting (- 35) meters for y, (+ 18 )meters for x and (-26) meters for z
\(D = 18 - 35 -26\)
\(D = - 43\ m\)
So the displacement is 43 meters to the left
Can the sun explain global warming? ( 2 points) Suppose that the Earth has warmed up by 1 K in the last hundred years. i) How much would the solar constant have to increase to explain this? ii) Compare this to the observed fluctuation of the solar constant over the past 400 years (shown in class) For part (i), begin with the standard 'blackbody' calculation from class, that is: set α=0.30, and assume that the Earth acts as a blackbody in the infrared.
Answers
No, the sun cannot explain global warming. Global warming is a phenomenon in which the temperature of the Earth's surface and atmosphere is rising continuously due to human activities such as deforestation, burning of fossil fuels, and industrialization.
This increase in temperature cannot be explained only by an increase in solar radiation.There are several factors which contribute to global warming, including greenhouse gases such as carbon dioxide, methane, and water vapor. These gases trap heat in the Earth's atmosphere, which causes the planet's temperature to rise. The sun's radiation does contribute to global warming, but it is not the main cause.
i) To calculate the increase in solar radiation that would cause the Earth to warm up by 1 K, we can use the following formula:ΔS = ΔT / αWhere ΔS is the increase in solar constant, ΔT is the increase in temperature, and α is the Earth's albedo (reflectivity).α = 0.30 is the standard value used for the Earth's albedo.ΔS = ΔT / αΔS = 1 K / 0.30ΔS = 3.33 W/m2So, to explain the increase in temperature of 1 K over the last hundred years, the solar constant would need to increase by 3.33 W/m2.
ii) The observed fluctuation of the solar constant over the past 400 years has been around 0.1% to 0.2%. This is much smaller than the 3.33 W/m2 required to explain the increase in temperature of 1 K over the last hundred years. Therefore, it is unlikely that the sun is the main cause of global warming.
The sun cannot explain global warming. While the sun's radiation does contribute to global warming, it is not the main cause. The main cause of global warming is human activities, particularly the burning of fossil fuels, which release large amounts of greenhouse gases into the atmosphere.
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A student determines the speed of three cars on a straight road.
The student measured the time for the cars to travel 50m.
Answers
Answer:
5.102 m/s
Explanation:
50/9.8=5.102m/s
how many unpaired electrons would you expect for chromium in [cr(h2o)6] 3 ? is this a paramagnetic or diamagnetic material?
Answers
\([Cr(H_{2}O)_{6}]_{3+}\) is paramagnetic due to the presence of unpaired electrons. Paramagnetic materials are attracted to an external magnetic field.
To determine the number of unpaired electrons in the \([Cr(H_{2}O)_{6}]_{3+}\) complex, we need to consider the electron configuration of chromium.
Chromium (Cr) has an atomic number of 24. Its ground-state electron configuration is [Ar] 3d5 4s1. In the \([Cr(H_{2}O)_{6}]_{3+}\) complex, Cr loses three electrons to form a +3 charge.
To distribute the remaining electrons, we start by filling the orbitals in the order of increasing energy. The d-orbitals can hold a maximum of 10 electrons.
In this case, since Cr has three fewer electrons, it leaves us with three unpaired electrons in the d-orbitals.
Therefore, \([Cr(H_{2}O)_{6}]_{3+}\) is paramagnetic due to the presence of unpaired electrons. Paramagnetic materials are attracted to an external magnetic field.
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