An element has 2 shells and belongs to 2nd group .Find the atomic no.

1.	An element has 2 shells and belongs to 2nd group .Find the atomic no. and write the subshellelectronic configuration.
Answer» ANSWER: Three shells are K,L,M. The SUBSHELLS are 1s,2s,2P,3S,2p,3d Group number: 17 Electrons in last SHELL: 7 Shell electronic configuration 2,8,7 Sub-shell electronic configuration 1s 2 ,2s 2 ,2p 6 ,3s 2 ,3p 5 Explanation: was this helpful Mark as brainlist

An element has 2 shells and belongs to 2nd group .Find the atomic no. and write the subshellelectronic configuration.

Answer»

Three shells are K,L,M. The SUBSHELLS are 1s,2s,2P,3S,2p,3d

Group number: 17

Electrons in last SHELL: 7

Shell electronic configuration 2,8,7

Sub-shell electronic configuration 1s

2 ,2s 2 ,2p 6 ,3s 2 ,3p 5

Explanation:

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