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.

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.

Answer:

visible light spectrum

Explanation:

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]

The 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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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

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.

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:

Answer:

Beak size and shape.

Explanation:

Answer:

D

Explanation:

I got that right:)

Nonmetal atoms tend to gain  enough electrons to fill their valence shell when forming ions.

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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Answer:

True i think.

Explanation:

Answer:

Water, Ethonal, Ammonia, Sulfur Dioxide, and hydrogen sulfide.

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.

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.

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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Answer:

1 d

2 c

3 b

4 e

5 a

Answer:

6E26

Explanation:

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:

Answer:

It is Double Replacment

Explanation:

They traded bonds.

Balanced Equation is 2AgNO3 + CaCl2 = 2 AgCl +1Ca(NO3)2

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.

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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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

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

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

The declaration made in the image's results indicates that a chemical shift has taken place. There occurs the creation of gas.

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.

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.

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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Answer:

18 and Period 2

Explanation:

Neon (Ne), chemical element, inert gas of Group 18

Neons period on the periodic table is period 2.

Answer:

It is this below

Explanation:

P = m/v

Answer: Protons

Explanation:

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.

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:

Answer:

true :)

Explanation:

have a great day!!

Answer:

hshzjndbejkxn. znkskakannamzm msk