The last subshell of an element is 3p and there are 3 elections in it.
Write the complete subshell electronic configuration of the element. Identify its group and Period.
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Complete the electronic configuration is 1s 2,2s 2 ,2p 6,3s 2,3p 6 ,3d 8 ,4s 2,and atomic number is 28.
Period number: 8+2=10,
∵ group number = No. of valence electron
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