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ChemistryCLASS 11CBSE

answered 20 May 2026

What does 1s, 2s, 2p, 3s, 3p mean?

A.VERIFIED ANSWERfact-checked by tutors

Notation	Shell	Subshell	Max Electrons
1s	1st	s (spherical)	2
2s	2nd	s	2
2p	2nd	p (dumbbell)	6
3s	3rd	s	2
3p	3rd	p	6

Number = energy level (shell) | Letter = subshell type.

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