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Question

What is the electronic configuration of 4018Ar?

A
1, 8, 9
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B
2, 8, 8
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C
2, 8, 8, 3
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D
2, 8, 18, 12
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Solution

The correct option is B 2, 8, 8
The maximum number of electrons that a shell can accommodate is given by 2n2, where n is the shell number.

The atomic number of argon (Ar) is 18 and its electronic configuration is:
ShellKLMNo. of electrons 2 8 8

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