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stepan [7]
3 years ago
6

What structure do all of these elements have in common?

Chemistry
2 answers:
Dmitrij [34]3 years ago
7 0
The answer is c because of going left to right
Dafna11 [192]3 years ago
3 0
C) The number of energy levels
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Helium atom itself is already stable, so it doesn't need to combine with another helium atom to form a molecule, hence we call it monatomic.

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