How do the atomic number and the mass number of an element
change after beta decay?
A. Atomic number stays the
same; mass number
increases by 1.
C. Atomic number increases by
1; mass number stays the
same.
B. Atomic number stays the
same; mass number
decreases by 1.
D. Atomic number decreases by
1; mass number stays the
same.
Answers
Answer:
A.
Explanation:
Related Questions
I'm lyrics texting my crush and want to know what song i should do
Answers
Answer: mine by bazzie
jus' gonna tell you how i feel (look)
you so focking precious when you smile (heh,yeah)
hit it from the back and drive you wild, oh yeah
girl/boy, lose myself in those eyess
i just had to let you know you're mineee
Put the following elements in order of increasing first ionization energy (lowest to highest): S, Ca, Mg,
CI
Answers
Answer: Ca, Mg, S, Cl
Explanation: general trends are IE increases as the number of electrons in the outermost shell, and decreases as the number of shells (and shielding effect) increases.
S outer 6, shells 3
Ca outer 2, shells 4
Mg outer 2, shells 3
Cl outer 7, shells 3
Ca has 2 outer, 4 shells —> lowest
others have 3shells
Mg 2outer, S 6, Cl 7
What’s Neon family number? And period?
Answers
Answer:
18 and Period 2
Explanation:
Neon (Ne), chemical element, inert gas of Group 18
Neons period on the periodic table is period 2.
The answers are in the picture. this us the question, An increase in carbon dioxide production has led to an increase in global temperatures, which is causing glaciers to melt faster. If this trend continues, how will animals living in the polar regions be affected?
Answers
Answer:
D
Explanation:
because if there is no land for them they wont survive in only water
The increase in global temperature melts the ice in polar regions. This worsely affects the animals living there. Hence, they will migrate to other areas but this is in fact not possible for their adaptation in other areas and they may subject to extinction.
What is global warming ?Global warming is the rise of temperature of earth surface all over the world. The significant reason for global warming is green house effect. Gases like carbon dioxide, methane gas etc. are intensely absorbing temperature that is radiating back from earth.
Hence, these gases are increasing the atmospheric temperature in earth. Global warming have very serious impacts that going up to the major discussion to solve nowadays.
The melting of polar icebergs and rising of sea level definitely leads to the extinction of animals living in polar region. They cant be adopted to other regions and migrating to other areas does not save them. Hence, they will extinct from earth. Therefore, option d is correct.
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39. Consider the following molecules:
(a) H2O
(c) CO2
(e) CC14
(b) NHA
(d) CIF
(i) In which compound are the bonds most polar?
(ii) Which compounds in the list are not polar?
(iii) Which atom in CIF is more negatively charged?
Answers
ii) h20
iii) i’m not sure
not fully sure but hope this helps!
If you roll a bowling ball and a marble at the same
speed, which one has more Kinetic Energy?
Answers
Answer:
The marble
Explanation:
Even though they both have kinetic energy, the marble has more since the weight of the bowling ball is heavier, leaving it to stop faster than the marble itself.
Help please
What is the equation for density?
O D= m
OD=
m
m
D=
>le Els -
OD=ž
= { mu?
Answers
Answer:
It is this below
Explanation:
P = m/v
Which feature of the Galapagos Finch observed by Charles Darwin contributed to his theory of evolution?
1. feather color
2. wing shape
3. body size
4. beak size and shape
Answers
Answer:
Beak size and shape.
Explanation:
How many electrons are being shared between the two carbon atoms in the covalent compound ethyne? Ethyne has the structure: H−C≡C−H
Answers
Answer:
Three lines between the carbon atoms in the Lewis structure represent three covalent bonds. Each covalent bond is a shared pair of electrons, hence there are six electrons being shared between the carbon atoms in ethyne.
The number of electrons that are being shared between the two carbon atoms in the covalent compound ethyne is six.
What are covalent bonds?Covalent bond are formed by the sharing of electrons between two atoms.
In ethyne molecule two carbon atoms are present and between two carbon atoms three covalent bonds are present. And each covalent bond is formed by the sharing of two electrons. So three covalent bonds are formed by the sharing of 6 electrons.
Hence in ethyne 6 electrons are being shared.
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Kate and Janie are about to pour water into a beaker when they notice
the beaker has a crack at the bottom. What should the students do
with the beaker?
Answers
Answer:
Put the beaker in the broken glassware disposal and replace the beaker
Explanation:
Any beaker which has a crack could break/shatter if you apply heat. Also, cracked glassware is a lab safety hazard.
Give an example of a formula of an ionic compound and explain why the formula is ionic.
Please can someone help???
Answers
Answer:
NaCl
The overall ionic formula for a compound must be electrically neutral, meaning it has no charge.
When writing the formula for the ionic compound, the cation comes first, followed by the anion, both with numeric subscripts to indicate the number of atoms of each.
ions are formed when metals are combined with nonmetals
The electron has a negative charge.
True
False
Answers
Answer:
true :)
Explanation:
have a great day!!
Electrons have a negative charge. The charge in the proton and electron are exactly the same size but opposite.
The wavelengths humans can see are known as ______.
UV light
Infrared
Visible light
All of the above
Answers
Answer:
visible light spectrum
Explanation:
when a coil of wire is connected to a batter, an electric current flows through it. True or False
Answers
Answer:
True i think.
Explanation:
6.0x10^26 molecules of sodium hydroxide
Answers
Answer:
6E26
Explanation:
please help as soon and best answer gets brainlest
Answers
Answer:
Mass, temperature, and phase.
I think temperature because the higher the temperature of a given quantity of a substance, more is its thermal energy. Similarly, for the same temperature, higher mass of a substance will contain more thermal energy.
How many electrons do nonmetal atoms tend to gain when forming ions?
A. One or two
B. A number equal to their number of valence electrons
C. Only one
D. Enough to fill their valence shell
Answers
Answer:
D
Explanation:
I got that right:)
Nonmetal atoms tend to gain enough electrons to fill their valence shell when forming ions.
What is an atom?
An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
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Identify the type of reaction
CaCl2 + AgNO3 --> AgCl + Ca(NO3)2
Answers
Answer:
It is Double Replacment
Explanation:
They traded bonds.
Balanced Equation is 2AgNO3 + CaCl2 = 2 AgCl +1Ca(NO3)2
What do you think will happen if you put it above the tube that is over the hot soil?
Answers
Answer:
what is "it"
Explanation:
if it's a liquid it will boil
if it's a chemical it could burn or catch on fire
Match the following pls
Answers
Answer:
1 d
2 c
3 b
4 e
5 a
In your lab group you combined vinegar and water and observed the results shown in the picture. Choose ALL of the evidence that
supports that a chemical change has occurred.
A gas is produced.
B)The color changed.
c) Bubbling occurred.
D) The baking soda dissolved.
E) There is a change in the composition of the reactants.
ANOTHER HELP OVER HEREEEEEE PLSSSSSSS
Answers
The declaration made in the image's results indicates that a chemical shift has taken place. There occurs the creation of gas.
What occurred when you put vinegar in the water?This occurs as a result of vinegar's composition of acetic acid and water. Acetic acid and water molecules create robust connections. These bonds cause the molecules inside the solution to move more slowly than those in pure water, hastening the freezing of the solution.
Briefing:A cup of vinegar and a cup of warm water are the basic components of the vinegar cleaning solution. Grease as well as hard water stains are easier to remove with warm water. It may be best to combine the vinegar and distilled water rather than tap water when filling a spray container that will be used often.
To create a chemical reaction, what can you combine with vinegar?A chemical reaction between vinegar (acetic acid) and baking soda (sodium bicarbonate) results in the production of salt (sodium acetate), water, and carbon dioxide gas.
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Can you help with this thanks
Answers
Answer:
Steam escapes from a teapot. Is a chemical reaction occurring? No, because liquid to gas would be a physical change, not a chemical change
Explanation:
the substance that can not be further decomposed by ordinary chemical means is
A.water
B.gold
C.sugar
D.air
Answers
An equimolar mixture of X (g) and Y (g) is placed inside a rigid container at constant temperature. The particle diagram above represents the changes that occur over time. Based on the particle
diagram, which of the following best predicts whether or not the system has reached equilibrium by 300 s?
a. It is not possible to determine that the system has reached equilibrium by 300 s because the stoichiometry of the reaction is not known.
b. it is not possible to determine that the system has reached equilibrium by 300 s because the amounts of X, Y, and XY have continued to change
c. The system has reached equilibrium by 300 s because the rate of formation of XY is constant
d. The system has reached equilibrium by 300 s because the rates of consumption of X and Y are equal
Answers
Answer:
B
Explanation:
t= 300s has more XY than t=200s, which means that it continues to change
*i think
The system has been predicted to be not possible to reach equilibrium as changing X and Y concentration. Thus, option B is correct.
Equilibrium has been described as the condition in the reaction mixture, when the concentration of the product and the reactant are equal.
The given reaction has been represented as:
[tex]\rm X+Y\rightarrow\;XY[/tex]
Reaction mixture at 300 sThe given reaction has been represented as, with the increase in time, there has been the consumption of the reactant and the formation of product.
The concentration has been continuously changing with time. Thus, the determination of the equilibrium has been difficult with changing X and Y concentration.
Thus, option B is correct.
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Elements in the same period have the same number of
Which one ?
1.valence electrons
2.protons
3.Neutrons
4.orbits
Answers
Answer: Protons
Explanation:
how many valence electrons does hydrogen have
Answers
Answer:
Since hydrogen is the first element, its electron configuration is 1s1.
Explanation:
It has only one electron in its valence shell.
Valence electrons are the outermost electrons or electrons in the largest energy level. Hydrogen has only one electron, so that electron is a valence electron.
Answer:
One valence electron !!
Explanation:
Examples of polar molecules
Answers
Answer:
Water, Ethonal, Ammonia, Sulfur Dioxide, and hydrogen sulfide.
I need help with question 4!!!!!!!
*Please choose correctly*
Thank youuuu
Answers
Answer:
hshzjndbejkxn. znkskakannamzm msk
A meteor is moving 468 km per minute traveling in a south-to-north direction passed near Earth in 2013. Does this statement describe the meteors speed or velocity?
Answers
Answer:
it's describes the velocity. since a direction was specifically given, that means it is displacement, and displacement is to velocity while distance is to speed
Answer:
since a direction was specifically given, that means it is displacement, and displacement is to velocity while distance is to speed
Explanation:
HELP PLEASEEE!!!
If new information about the behavior of atoms is discovered and verified, then revisions will need to be made to the current _______.
Answers
Answer:
Atomic theory is. A
Explanation:
Subject to change if new information is discovered. B. A solution to the problem of differing isotopes. C. Unchanged able D. A descriptive table that lists all of the element
I hope this answered your question.