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3 years ago

How are an atoms chemical properties determined?

1 answer:

5 0

Electrons determine the chemical properties. Protons and neutrons are in the nucleus the number of protons determines the number of electrons of an atom

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Sodium and magnesium ions have 10 electrons surrounding their nuclei which ion would you expect to have the larger radius why

Maksim231197 [3]

Sodium because according to the atomic size trend of the periodic table. Elements further to the left are bigger while elements tot he right are smaller. This is also do to their charges, Na has a +1 charge meaning it doesn’t pull the electrons as close as the Mg does with its +2 charge.

8 0

4 years ago

Chlorine (cl) has an atomic number of 17. it often forms an ion by gaining 1 electron. what would its charge be?

Aliun [14]

Answer:

= -1

Explanation:

Chlorine belongs to the halogen group in the periodic table. It has an atomic number of 17, which indicates the number of protons and electrons in a neutral atom of chlorine is 17.
Therefore; with an atomic number of 17, its electronic configuration will be 2:8:7.
Thus; to attain a stable configuration chlorine requires to gain one electron, by so doing it becomes a negatively charged ion with a charge of -1.

6 0

3 years ago

Read 2 more answers

In nature, one common strategy to make thermodynamically unfavorable reactions proceed is to couple them chemically to reactions

maks197457 [2]

Answer:

31.3 kJ/mol is the free energy, ΔG, for the overall reaction, A⇌D.

Explanation:

A⇌B, $\Delta G_1$ = 11.9 kJ/mol ...[1]

B⇌C, $\Delta G_2$ = -26.7 kJ/mol ...[2]

C⇌D, $\Delta G_3$ = 7.30 kJ/mol ...[3]

A⇌D, $\Delta G_4$ = ?...[4]

[4] = [1] - [2] - [3] (Using Hess's law)

$\Delta G_4=\Delta G_1-(\Delta G_2+\Delta G_3)$

$=11.9 kJ/mol - (-26.7 kJ/mol+7.30 kJ/mol)$

$=\Delta G_4=31.3 kJ/mol$

31.3 kJ/mol is the free energy, ΔG, for the overall reaction, A⇌D.

7 0

4 years ago

A substance that undergoes a chemical change is still the same substance after the change

Alexxx [7]

After a chemical change, the substance always changes. It's only after a physical change that the substance does not change. Hope I helped :)

8 0

3 years ago

POH is a measure of the ________________ in solution. *

Digiron [165]

Answer:

Both acids and bases can measured using the pH or pOH scale. Both scales provide a measure of either the H+ concentration or the OH- concentration. Notice that each scale shows were acids and bases both are located. When acids are measured, the pH is less than 7, but the pOH is greater than 7.

Explanation:

3 0

3 years ago