Question

what is the penultimate shell of beryllium ​

Answer 1

Answer:

The shell under the valence shell is known as the penultimate shell And the one shell that is internal to penultimate is called the anti-penultimate shell, or pre-penultimate shell.

Answer 2

Answer:

The valence shell is the outermost shell in which the last electron goes in an atom of an element. The shell inner to the valence shell is known as penultimate shell and the shell inner to the penultimate shell is called penultimate or anti-penultimate shell.

Explanation:

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