Question

what is penultimate and anti-penultimate shell?​

Answer 1

Answer:

Main reasons behind the growth of services include rapid urbanization, the expansion of the public sector and increased demand for intermediate and final consumer services. Access to efficient services has become crucial for the productivity and competitiveness of the entire economy.

Answer 2

Answer:

Valence shell:- The last shell or orbit of an atom is known as its valence shell or ultimate shell that is represented by letter 'n'

Explanation:

Penultimate Shell :- The shell just before the ultimate shell is known as penultimate shell and represented by 'n - 1'

Anti-Penultimate Shell :- The shell before the penultimate shell is known as Anti-Penultimate shell and is represented by 'n - 2'

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