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Alex Ar [27]
3 years ago
5

2. List elements that need 3 electrons to have a stable outer shell.

Chemistry
1 answer:
stellarik [79]3 years ago
7 0
All of the elements in group five/fifteen. This is because the octet rule is that an element needs eight electrons to become stable. Five plus three is eight. I hope this helped.
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Balanced chemical equation for the decomposition of solid sodium sulfide in aqueous solution.
Oliga [24]
<h3>Answer:</h3>

Na₂S(s) → 2Na⁺(aq) + S²⁻(aq)

<h3>Explanation:</h3>

We need to know:

<h3>What are decomposition reactions?</h3>
  • Decomposition reactions are type of reactions in which a compound is broken down into two or more products.
  • When a soluble substance or a compound is dissolved in water it forms an aqueous solution.
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  • That is;

Na₂S(s) → 2Na⁺(aq) + S²⁻(aq)

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