Question

how many shells are completely occupied with electron in an element with atomic number 19

a) 2
b) 3
c)4
d)5​

Answer 1

Answer:

Atomic Number = 19

Electrons per shell - 2 , 8 , 9

Maximum Electrons in K = 2

Maximum Electrons in L = 8

Maximum Electrons in M = 18

:- 19th electron will occupy M - shell

Hence , option B is correct.

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Answer 2

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