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JAMB Chemistry 2016 Paper

Question : 31

Total: 50

Solution:

Concept:

Electronic shells correspond to the principal quantum numbers (

n = 1, 2, 3, \ldots

) present in the configuration.

Explanation:

The configuration is

1s^2\,2s^2\,2p^6\,3s^2\,3p^6\,4s^2

It contains electrons in the

n = 1

n = 2

n = 3

, and

n = 4

shells.

Thus, the atom has 4 occupied electronic shells.

Answer:

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