What are the next 3 steps in the sequence? ◻◻◻◼◼⬤⬤⬤◯▲▲▲◻◻◻◼◼⬤⬤⬤◯▲

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Ответ:

nathaniel12

19.07.2020

Chemistry

Atomic number is 12.

Explanation:

Atomic number = electrons in filled shells + outermost electrons

= 2 + 8 +2

= 12

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