Which types of orbitals are found in the principal energy level n = 2?
s
s, f
s, d
s, p
s, p, d

answer: s orbital and p orbital will present when value of principal quantum number or 'n' is 2.

explanation:

l = 0 to (n-)

n = principal quantum number

l = azimuthal quantum number, where 0 = s orbital, 1 = p orbital , 2 = d orbital , 3 = f.

orbitals found in the principal energy level n = 2 :

l = 0 to (2-1) = 0 to 1 ; 0,1 (by using equation (1) )

0 means 's' orbital and 1 means 'p' orbital.

2s and 2p orbitals will be present in the principal energy level when n is equal to 2.

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