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aleksandr82 [10.1K]
2 years ago
14

Which needs two less valence electrons to complete an octet, X+2?

Chemistry
1 answer:
Vladimir79 [104]2 years ago
7 0

Answer:

The answer to your question is Ca

Explanation:

Ne  has its octet completed so, this option is wrong. Neon is stable.

C  Carbon has 4 valence electrons not 2, it should lose 4 electrons to complete an octet, so this option is wrong.

N  Nitrogen has 5 valence electrons not 2 , so it should gain 3 electrons to complete an octet.

Ca Calcium is the right answer it has to electrons in its outermost shell, it have to lose 2 electrons to complete an octet.

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If 5. 0 grams of kcl is dissolved in 500 ml of water, what is the concentration of the resulting solution?
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If 5.0 grams of KCl is dissolved in 500 ml of water, the concentration of the resulting solution will be 0.134M.

<h3>How to calculate concentration?</h3>

The concentration of a solution can be calculated by using the following formula;

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According to this question, 5.0 grams of KCl is dissolved in 500 ml of water. The concentration is calculated as follows:

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