An atom of elements x has one more shell of electrons than an atom of beryllium,but h are s one less valence electron then beryllium.which element is element X?

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asked Jul 20, 2023 227k views

1 Answer

Opyh · Answer 1 · 2023-07-25T01:12:35+0000

Element X is sodium.

If there is one more shell of electrons, then this means it is one period below.

Since there is one less valence electron, it is one group to the left.