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dezoksy [38]
2 years ago
13

An atom of a mystery element contains 7 protons, 7 neutrons, and 7 electrons.

Chemistry
1 answer:
posledela2 years ago
3 0

A-14

Explanation:

Mass number (MN) = Proton number + Neutron number

MN=7+7

MN=14

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Sodium metal (Na) reacts with chlorine gas ( Cl2 ) to produce solid sodium chloride (NaCl).
Fynjy0 [20]

The unbalanced equations are the equations with different atomic numbers on the sides of the reaction. The unbalanced reaction is Na + Cl₂ → NaCl

<h3>What are balanced equations?</h3>

Balanced equations are the chemical reaction representation that has an equal number of the atomic number of the same species on the left and the right side of the reaction.

An unbalanced equation between sodium metal and chloride can be shown as:

Na + Cl₂ → NaCl

The equation is unbalanced as the number of chloride ions is more on the reactant side than the product side.

The balanced reaction will be:

2 Na + Cl₂  2NaCl

Learn more about balanced equations here:

brainly.com/question/10306791

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2 years ago
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