What are the KLMN notations for K and Ca? Why is the third digit no greater than 8 for these elements???
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Kshell - 1s
L. - 2s 2p
M. 3s 3p 3d
N. 4s 4p 4d 4f
For Na - 2,8,8,1
Ca - 2,8,8,2
K and Ca do not need 3d orbital which contains 10e- in M shell, and has higher energy.
hope this would help you
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