Question

what is the atomic number for an element which has only 2 electrons in its third shell

Answer 1

Answer:

The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element .

Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on.

Explanation:

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