Which statement best explains why hydrogen's atomic number is equal to its mass? (1 point)
O Hydrogen is in the first row and the first column of the periodic table.
O Hydrogen has one electron and one proton.
O Hydrogen does not have any neutrons.
O Hydrogen is stable, with two electrons in its outer shell.
Answers
We have that The Mass atomic number is equal to its mass number of Hydrogen because it bears no Neutrons .
The Mass atomic number is equal to its mass number of Hydrogen because it bears no Neutrons .The Hydrogen atom is devoid of any neutron.The hydrogen atom is made up of one electron and one proton.
For more information on this visit
https://brainly.com/question/4408975?referrer=searchResults
Answer:
1. A mental can be hammered into thin sheets and nonmetals are brittle
2. C vanadium
3. C silicon
4. B hydrogen does not have neutron
5. B francium has few valence electrons but they are in a higher energy level
annnoymousheyy avatar
6. A.
protons = 31
neutron = 39
electron = 28
7. C isotopes that are naturally occurring and unstable always exist in trace amount
8. C atomic number
9. B electrons move freely in curved paths around the nucleus
10. A low energy alpha particles passing through a field of high mass number particles
annnoymousheyy avatar
11. C on the right side of the periodic table
12. A nitrogen
13. A fluorine , chlorine , and iodine
14. C an ionic bond is likely because they will want to give away two valence electrons in order to become stable
15. D -2
annnoymousheyy avatar
16. The change in atomic number from 10 to 11
implies a change from a noble gas to a highly
reactive group 1 element. As a result of this,
reactivity increases. The atomic number of an element tells us the group to which the element belongs in the
periodic table.
annnoymousheyy avatar
An atomic number of 10 shows a filled outermost shell which is characteristic of the noble gases. Hence, as we move from this atomic number of
10 to an atomic number of 11, reactivity increases
positively. Atomic number 11 corresponds to a highly
annnoymousheyy avatar
17. The periodic table shows a correlation between the strength of the ionic connection and the position of the elements on the table. Because metals are positively charged and non-metals
annnoymousheyy avatar
are negatively charged, if you start on the left side of the periodic table and work your way right, the ionic charge and radius will gradually decrease and the charge will lessen.
To clarify, oxygen is a nonmetal with a little negative charge, whereas lithium is a metal with a positive charge
Explanation:
Related Questions
A sphere of radius 0.457 m, temperature 32.2 ∘
C, and emissivity 0.924 is located in an environment of temperature 82.9 ∘
C. At what rate does the sphere (a) emit and (b) absorb thermal radiation? (c) What is the sphere's net rate of energy exchange? (a) Number (b) Number Units Units
Answers
a) The sphere emits thermal radiation at a rate of 139.75 Watts.
b) The sphere absorbs thermal radiation at a rate of 37.66 Watts.
c) The sphere's net rate of energy exchange is 102.09 Watts.
What are the rates of thermal radiation emission, absorption, and net energy exchange for the sphere?To calculate the rates of thermal radiation emission and absorption, we can use the Stefan-Boltzmann law, which states that the rate of thermal radiation emitted or absorbed by an object is proportional to its surface area, temperature, and the Stefan-Boltzmann constant.
a) The rate of thermal radiation emitted by the sphere can be calculated using the formula:
Emitting Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(temperature^4 - environment\ temperature^4\))
Plugging in the given values:
Emitting Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((32.2 + 273.15)^4 - (82.9 + 273.15)^4)\)
Emitting Rate ≈ 139.75 Watts
b) The rate of thermal radiation absorbed by the sphere can be calculated in a similar way but using the environment temperature as the object's temperature:
Absorbing Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(environment\ temperature^4 - temperature^4\))
Plugging in the given values:
Absorbing Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((82.9 + 273.15)^4 - (32.2 + 273.15)^4)\)
Absorbing Rate ≈ 37.66 Watts
c) The net rate of energy exchange is the difference between the emitting rate and the absorbing rate:
Net Rate = Emitting Rate - Absorbing Rate
Net Rate = 139.75 Watts - 37.66 Watts
Net Rate ≈ 102.09 Watts
Therefore, the sphere emits thermal radiation at a rate of 139.75 Watts, absorbs thermal radiation at a rate of 37.66 Watts, and has a net rate of energy exchange of 102.09 Watts.
Note: The units for all the rates are Watts.
Learn more about thermal radiation emission
brainly.com/question/28517392
#SPJ11
Which of the following are conjugate acid/base pairs? Select all that apply. H2PO 4−and HPO4^2−H2CO3 and CO 3^2−
HCl and NaOH H3O + and OH − HCl and Cl−
Answers
A conjugate acid-base pair is the pair of two compounds which differ by the presence of a proton. An acid will donate protons to a base and become a conjugate base. A base will accept protons and become a conjugate acid.Conjugate acid/base pairs are as follows:H2PO4− and HPO42−H2CO3 and CO32−HCl and Cl−H3O+ and OH−Explanation:
H2PO4− and HPO42−H2PO4− can donate a proton to become HPO42− and the latter can accept a proton to become H2PO4−.H2CO3 and CO32−H2CO3 can donate a proton to become CO32− and the latter can accept a proton to become H2CO3.HCl and Cl−HCl can donate a proton to become Cl− and the latter can accept a proton to become HCl.H3O+ and OH−H3O+ can donate a proton to become OH− and the latter can accept a proton to become H3O+.Therefore, the following are conjugate acid/base pairs:H2PO4− and HPO42−H2CO3 and CO32−HCl and Cl−H3O+ and OH−
to know more about conjugate intake pls visit:
https://brainly.com/question/32676227
#SPJ11
Electromagnetic energy is the study of _____________ energy.
Answers
Calculate the number of moles in the following samples.
a. 41.4g Al(OH)3
Answers
Answer:
0.531 mol Al(OH)3
Which one please help
Answers
Answer:
C
Explanation:
Adding another Li will balance the equation
2LiNO3 + CaBr2 → Ca(NO3)2 + 2LiBr
Part A The first step to engineering is to define the problem. Write down the problem the students have to solve, and describe the challenges they will face when coming up with a solution.
WILL MARK BRAINLIEST!!
Answers
Answer:
Engineering is all about solving problems using math, science, and technical knowledge. And engineers have solved a lot of problems in the world by designing and building various technologies. We have everything from machines that can breathe for you in hospitals to suspension bridges to computers we use every day. All of these things were once designed by engineers using the engineering design process.
Explanation:
Answer:
Students will have to use their brains to solve problems and challenges they will face to find a solution to cleaning up oil spills. Students will face failures after completing their solution, lots of research, and problems during the making of their solutions. What will work? What won't?
Explanation:
Hope this helps!
how to describe a ufo??
Answers
Answer:
Unidentified flying object or fly saucer.
Explanation:
Answer:
It is a silver dish that has round windows around it with little circluar lights round it too.
Why are scientists worried that climate change will cause these toxic algae blooms to become more frequent?
Answers
Answer: Eutrophication is the enhancement of the growth of algae in the water body.
Explanation:
The scientists are worried for the climate change as if the climate changed to prolonged rainy then the frequent raining can remove toxic chemicals from the agricultural sites, landfills, industries, and from other locations and deposit them to the water body (river, lakes, ponds, and others). The deposition of the salts of nitrogen, phosphorus, and sulfur promotes the growth of algae in the water body. This leads to reduction in the concentration of oxygen in the water body. This is called eutrophication. The lack of oxygen can lead to mortality of aquatic animals.
If the metal from problem 4 was initially at room temperature (22 0 C), what would the final temperature of the metal be? You know that you add 120 joules of energy to the metal. What change in temperature would you observe Q = is energy as Heat, 120 Joulesm = mass in grams, 5.0 gramsc = is the specific heat capacity, 0.385 J/g°CΔT = the change in temperature, calculated as Final Temperature - Initial T120 = 5 * 0.385 * T120 = 1.925TT = 62°C of change in temperature
Answers
The question is mostly solved. The definition of heat is used for this problem which tells us:
\(Q=mCp\Delta T\)Where,
Q is the heat added to the system, 120 J
m is the mass of the metal, 5.0 g
Cp is the specific heat of the metal, 0.385J/g°C
dT is the change of temperature:
\(\Delta T=T_2-T_1\)T2 is the final temperature, unknown
T1 is the initial temperature, 22°C
We clear the final temperature from the equation:
\(\begin{gathered} Q=mCp(T_2-T_1) \\ Q=mCpT_2-mCpT_1 \\ T_2=\frac{Q+mCpT_1}{mCp} \end{gathered}\)Now, we replace the known data:
\(T_2=\frac{120J+5.0g\times0.385\frac{J}{g\degree C}\times22\degree C}{5.0g\times0.385\frac{J}{g\degree C}}\)\(\begin{gathered} T_2=\frac{120+5.0\times0.385\times22}{5.0\times0.385}\degree C \\ T_2=84\degree C \end{gathered}\)Answer:
The final temperature of the metal will be 84°C
The change in the temperature will be 84°C-22°C=62°C
Convert 3.48 Km into millimeters. The correct answer with correct units is:
A.)0.000000348M
B.)3. 4800 Mm
C.)3,480,000 mm
D.) 3, 480,000,000 mm
Answers
Answer:
C- 3480000mm
Explanation:
3480000mm
Which of the following actions describes deposition?
breaking rock into smaller pieces
dropping sediment in one location, where it builds up
moving rock from one location to another
flowing soil or mud due to gravity
Answers
The following actions describe deposition as flowing soil or mud due to gravity. Option D.
Sedimentation is the accumulation of sediments carried by the wind running water sea or ice. Sediments are carried as pebbles sand mud, or dissolved salts in water. A deposition is the direct transition of a substance from the gaseous state to the solid state on cooling without going through the liquid state.
Sedimentation is the geological process in which sediments soils and rocks are added to form landforms or land masses. Wind ice water and gravity cause previously weathered surface material to deposit and lose sufficient kinetic energy within the fluid to form a layer of sediment. Several factors influence how sediment settles. Sediment is removed from new surface locations. Precipitation is the change of state of a gaseous substance into a solid.
Learn more about Deposition here:-https://brainly.com/question/1470616
#SPJ1
How do I identify the mass of an atom
Answers
Explanation:
You multiply the atomic weight and I believe the protons.
Mixing a concentrated strong acid with a concentrated strong bases is dangerous, because:
I. The reaction between the hydronium ion and the hydroxide ion is very exothermic
II. Acid-base reactions are always extremely dangerous
III. When using concentrated solutions, the relative amount of water available to absorb heat is small
a. I & II
b. II & III
c. I & III
d. II only
Answers
The correct answer is (c) I & III because the reaction between a concentrated strong acid and base releases heat and concentrated solutions have limited water to absorb it.
How acid-base reaction occurs?When a concentrated strong acid and a concentrated strong base are mixed, an acid-base reaction occurs, which can produce a large amount of heat. The reaction between hydronium ions (H₃O⁺) from the acid and hydroxide ions (OH⁻) from the base is highly exothermic, meaning that it releases a significant amount of heat. This is why mixing concentrated strong acids and bases can be dangerous.
Moreover, when using concentrated solutions, the relative amount of water available to absorb heat is small. This means that any heat generated during the reaction may not be adequately absorbed or dissipated, which can result in an increase in temperature and potentially cause a violent reaction.
However, statement II is incorrect since not all acid-base reactions are extremely dangerous. The danger depends on the specific acids and bases being used, as well as the concentration and conditions of the reaction.
Learn more about Acid-base reaction
brainly.com/question/31262369
#SPJ11
atoms of the same element that have different numbers of neutrons, what it?
Answers
Answer:
Isotopes.
Explanation:
Atoms of the same element that have different numbers of neutrons but the same number of protons are called Isotopes.
describe the light spectrum of a star
Answers
Answer:
The visible light spectrum is the section of the electromagnetic radiation spectrum that is visible to the human eye. Essentially, that equates to the colors the human eye can see. It ranges in wavelength from approximately 400 nanometers (4 x 10 -7 m, which is violet) to 700 nm (7 x 10 -7 m, which is red).
(Hope this helps) Sky
How many liters of water would you need to add to 4.36 moles of NaCl to create a 4 M solution?
Answers
Explanation:
1 M = 1 mol/L
4.36 mol NaCl ×(1L H20 / 4 mol NaCl) = 1.09 L H20
Answer:
1.09 L of water
Explanation:
4.36 mol NaCl ×(1L of H20 / 4 mol NaCl) = 1.09 L of water
HELP ME WITH THIS QUESTION ASAP PLESE!!
Answers
Answer:
the 2nd choice, nervous and muscular
Find the density if the mass is 20 grams and the volume is 10 mL?
A.) 200 g/mL
B.) .5 g/mL
C.) 1/2 g/mL
D.) 2 g/mL
Answers
Answer:
D= 2g/mL
Explanation:
20g/10ml= 2g/mL
balance the following equation FeC²+Cl². FeCl³
Answers
Answer:
this equation is not proper see that where is the reactant.
Explanation:
give give a proper question and I will
if fecl2 + c2 gives a fecl3 where does the carbon compound go
Answer:
2FeCl2 + Cl2 → 2FeCl3
Explanation:
What happens to the density of a substance when it is heated? Explain your answer.
Answers
Heating a substance causes molecules to speed up and spread slightly further apart, occupying a larger volume that results in a decrease in density. Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density.
From: www.middleschoolchemistry.com
explain why the ionizational energy of
a. Al < Mg
b. S < P
c. B < Be
Answers
Ionization energy increases with increase in electronegativity. The ionization energy of aluminium is less than that of magnesium because it is easier to remove an electron from the p orbital than that from an s orbital.
What is ionization energy?Ionization energy is the minimum energy required to remove a valence electron from the atom. Thus it depends on the orbital and electronegativity of the atom.
In the case of magnesium the valence electrons are in s orbital and that of aluminium is p orbital. It is easy to remove an electron p orbital than that from a s orbital. Thus Mg has higher ionization energy than Al.
In the case of phosphorous, the valence shell is half filled making it highly stable and thus higher ionization energy. Out of the four valence electrons in p orbital of sulphur, one can be easily removed and thus has lower ionization energy.
In the case of Be the same can be applied,as in Mg, that removing its valence electron from s orbital is hard than to remove an electron from the p orbital of boron.
To find more on ionization energy, refer here:
https://brainly.com/question/28385102
#SPJ1
Use Boyle's, Charles's or Gay-Lussac's law to calculate the missing value in each of the following.
a. V1 = 2.0 , P1 = 0.82 atm, V2 = 1.0 L, P2 = ?
b. V1 = 250 mL, T1 = ?, V2 = 400 mL, T2 = 298 K
c. V1 = 0,55 L, P1 = 740 mm Hg, V2 = 0.80L, P2 = ?
Answers
Boyle's law, named after the scientist Robert Boyle, states that at a constant temperature, the pressure and volume of a gas are inversely proportional to each other. This means that as the pressure of a gas increases, its volume decreases, and vice versa, as long as the temperature remains constant.
a. Using Boyle's law, which states that the product of the initial pressure and volume of a gas is equal to the product of its final pressure and volume at constant temperature.
P1V1 = P2V2
0.82 atm x 2.0 L = P2 x 1.0 L
P2 = (0.82 atm x 2.0 L) / 1.0 L = 1.64 atm
Therefore, the missing value is P2 = 1.64 atm.
b. Using Charles's law, which states that the volume of a gas at constant pressure is directly proportional to its absolute temperature.
V1/T1 = V2/T2
(250 mL)/T1 = (400 mL)/(298 K)
T1 = (250 mL x 298 K) / 400 mL = 186.5 K
Therefore, the missing value is T1 = 186.5 K.
c. Using Gay-Lussac's law, which states that the pressure of a gas is directly proportional to its absolute temperature at constant volume.
P1/T1 = P2/T2
(740 mm Hg)/T1 = P2/(298 K)
P2 = (740 mm Hg x 298 K) / T1
We also know that the initial and final volumes are not equal, so the gas is not isochoric (constant volume), and therefore we can't use Boyle's law.
Let's assume that the temperature is measured in Kelvin, so T1 = T2 + 273.15 K
P2 = (740 mm Hg x 298 K) / (T2 + 273.15 K)
P2 = (740 mm Hg x 298 K) / (0.8 L x 273.15 K / 0.55 L)
P2 = (740 mm Hg x 298 K x 0.55 L) / (0.8 L x 273.15 K)
P2 ≈ 460 mm Hg
Therefore, the missing value is P2 = 460 mm Hg.
To learn more about Boyle's law , Charles's or Gay-Lussac's law here:
https://brainly.com/question/12807582
#SPJ1
If 3.52 g of K3PO4 was produced in the reaction below and the percent yield was 35.5%, what was the theoretical yield?
Answers
theoretical yield = (actual yield) / (percent yield / 100)
We know that the actual yield is 3.52 g, and the percent yield is 35.5%, so we can substitute these values into the formula:
theoretical yield = 3.52 g / (35.5 / 100)
Simplifying:
theoretical yield = 9.92 g
Therefore, the theoretical yield of K3PO4 is 9.92 g.
An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. What other characteristic does the radiation have?a. some shielding requiredb. no massc. large massd. high penetrating power
Answers
An isotope undergoing radioactive decay by emitting radiation that has a -1 charge is most likely an electron, which is commonly known as a beta particle. Beta particles have a negative charge and are emitted by the nucleus during beta decay.
Here, correct option is A.
Beta particles have a small mass compared to other types of particles, such as alpha particles and neutrons, but they do have mass. Therefore, option (b) "no mass" is incorrect.
Beta particles have a moderate penetrating power and can be stopped by a few millimeters of aluminum or a few centimeters of wood or other materials. Therefore, option (d) "high penetrating power" is also incorrect.
Thus, the correct answer to this question is option (a) "some shielding required," which means that some amount of material is required to shield against the beta radiation. Beta particles can penetrate some distance into materials, but they can be stopped by a layer of material of sufficient thickness.
Know more about Beta particles here
https://brainly.com/question/3580345#
#SPJ11
Choose Every Molecule That Will Show Only Two Signals, With An Integration Ratio 2:3, In 1H NMR Spectra.
Answers
The 1H NMR spectrum contains a total of four signals.
In 1h NMR, what is integration?NMR Spectroscopy integration. In NMR, the integration reveals how many protons a particular signal is made up of. Let's say that it is the ratio of the protons behind each signal to be more precise.
In 1H NMR spectroscopy, which of the following compounds exhibits two signals?Thus, the 1H NMR spectrum of the molecule methyl acetate exhibits two signals. Why only two signals for a molecule having total six hydrogens? The reason for this is chemical equivalency. The three Ha protons in the methyl group, which is bound to C=O, can be used to separate the six hydrogens in total into two groups.
To know more about spectrum visit:-
https://brainly.com/question/6836691
#SPJ4
Wind can cause erosion that changes the surface of the Earth. Wind erosion can have negative effects on the environment by removing soil and polluting the air during dust storms. What is one way to prevent wind erosion?
A. People can drive off-road bikes across the desert.
B. Ranchers can let their cattle graze in areas with little plant growth.
C. Construction workers can wet the ground before driving on it or digging.
D. Farmers can remove all plant material in the soil between planting seasons.
Answers
One approach to stop wind erosion is for construction workers to moisten the ground before driving on it or digging.
How does wind erosion impact the surface of the Earth?Wind has the power to transfer little sand grains and other debris kilometres from their original site. It may also remove layers of sediment and dirt off the top of a landscape. By scraping against the surface or shattering into smaller pieces as they travel, the materials carried by the wind degrade the soil while they are deposited in new areas.
What harm does wind erosion cause?Impacts. Economic, health, and environmental costs associated with wind erosion include soil loss, high cleaning costs, absenteeism, transportation delays, sand-blasted crops, and retail losses.
To know more about wind erosion visit:-
https://brainly.com/question/11506364
#SPJ1
Na2NO₃ → Na2 NO2 + O2
Answers
Answer:
4NO2 + 2Na2O + O2 → 4NaNO3
Saturated fatty acid tails pack closely together, giving these triglycerides relatively ___ melting points; therefore, they are ___ at room temperature.
A. low; solids or semi-solids
B. low; liquids
C. high; solids or semi-solids
D. high; liquids
Answers
(c) Saturated fatty acid tails pack closely together, giving these triglycerides relatively high melting points; therefore, they are solids or semi-solids at room temperature
Saturated fatty acid tails in triglycerides pack closely together due to the absence of double bonds, which allows for maximum van der Waals interactions between the molecules. This close packing results in a higher melting point for saturated triglycerides compared to unsaturated ones.
At room temperature, saturated triglycerides tend to be solids or semi-solids because their higher melting points make them less likely to be in a liquid state. Examples of saturated triglycerides that are solids or semi-solids at room temperature include butter and coconut oil, which contain predominantly saturated fatty acid tails.
Learn more about Saturated fatty acid:
https://brainly.com/question/30875813
#SPJ11
Which statement about atoms during a chemical change is true?
Answers
Answer:
In a chemical reaction, only atoms are present in the reactant and can end up with molecules. No new atoms are created and no more atoms are destroyed. In a chemical reaction, reactants contact with each other and the bond between atoms in the reactant is broken and atoms rearrange and form new bonds to make the product.
Explanation:
What pillar of sustainability is broken by recycling
electronics in India? Should the US make a law that electronics can
only be recycled in the US?
Answers
The pillar of sustainability broken by recycling electronics in India is environmental sustainability. Implementing a law that restricts electronics recycling to the US would not necessarily be the most effective solution, as it overlooks the complex global dynamics of electronic waste management.
Recycling electronics in India often involves improper disposal methods, such as burning or dismantling without proper safety measures. This leads to environmental pollution, including the release of hazardous substances into the air, soil, and water, thus violating the principle of environmental sustainability.
However, simply mandating that electronics can only be recycled in the US may not be the most optimal solution. Electronic waste is a global issue, and restricting recycling to a single country disregards the fact that electronic products are manufactured and consumed worldwide. A more comprehensive approach to addressing electronic waste would involve international cooperation, strict regulations, and monitoring of recycling practices to ensure they meet environmental standards.
Efforts should focus on improving recycling practices globally, including promoting responsible electronic waste management, developing sustainable recycling infrastructure in multiple countries, and encouraging the adoption of safe and environmentally friendly recycling practices. This approach would foster global sustainability and address the challenges associated with electronic waste disposal more effectively than a geographically limited restriction.
To learn more about sustainability, here
https://brainly.com/question/32771548
#SPJ4