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3 years ago

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Which statement is not correct regarding radiation? Nuclear reactions arise from an atom's nucleus. Alpha, Beta, and Gamma are t

ypes of radiation. Most of the earth's nuclear energy comes from the Sun. Radioactive elements have an unbalanced number of protons and electrons.

1 answer:

Rina8888 [55]3 years ago

6 0

Answer:

I believe it is the last statement.

Explanation:

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2. What group is the atom in?<br> 2 or 2A<br> 6<br> 14 <br> 1

Juliette [100K]

Answer:

$\Large \boxed{\mathrm{Group \ 4}}$

Explanation:

The number of valence electrons tells us the group number of the neutral atom.

The atom has 4 valence electrons.

The atom is in group 4.

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3 years ago

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How many Lewis dot structures does nitrogen have

Aleks04 [339]

5 i believe the right answer

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3 years ago

Which statement best explains why mass is not conserved in a nuclear change?

kogti [31]

Answer:

Mass in nuclear reactions is not strictly conserved due to this principle of mass and energy being quite similar. We know that nuclear reactions release a lot of energy. This energy, though, is actually mass that is lost from nucleons, converted into energy, and lost as the mass defect.

Some mass is turned into energy, according to E=mc2.

<em><u>Explanation:</u></em>

E=mc2 is probably the most famous equation. E is the energy, m is mass, and c is the constant speed of light. Einstein came up with it to show that energy and mass are proportional - one can turn into the other, and back again.

Mass in nuclear reactions is not strictly conserved due to this principle of mass and energy being quite similar. We know that nuclear reactions release a lot of energy. This energy, though, is actually mass that is lost from nucleons, converted into energy, and lost as the mass defect.

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2 years ago

PLEASE HELP BRAINLIEST AND 15 points.

PtichkaEL [24]

Answer:

Substance B, boiling point of 105 °C

Explanation:

Non volatile substances have high boiling points

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3 years ago

The rate law for the reaction

juin [17]

Explanation:

Since, the given reaction is as follows.

$2NO(g) + Cl_{2}(g) \rightarrow 2NOCl(g)$

Hence, rate law of the reaction is as follows.

R = $k[NO][Cl_{2}]$

As it is known that rate of a reaction depends on the initial concentration of products. So here, the rate of reaction will depend on the concentration of NO and $Cl_{2}$ . Since, power of the concentrations of each of these is equal to 1. Therefore, order of the reaction is equal to 1 + 1 = 2.

According to the rate law, reactants involved in the rate determining step are NO and $Cl_{2}$ . Hence, first step of the mechanism is the rate determining step.

Also, according to the rate of reaction doubling the concentration of NO will double the rate of reaction.

The number of reactants taking part in a single step of the reaction is known as molecularity of the reaction. Therefore, molecularity of the first step of the reaction is 2.

Both the given steps are not termolecular.

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3 years ago