Explanation
l = 3 means f–subshell. Max. no. of e- = 14.
(b) as per rules.
If n = 3, l ≠ 3.
n = 2, l = 1 means 2p-subshell.
2p3 has three electrons each with spin = + 1/2.
Probability of electron in Px orbital is zero in the xy plane.
When l = 2, m≠ –3.
Wave nature of electron was shown by Davisson and Germer.
Z = 9 for F. Its ion is F−.
px orbital has one nodal plane in the yz plane.
He2+ contains no electron. All others contain one electron each.
The element is F. Its ion is F− i.e. M− (E.C. of M = ns2 np5. It will gain one electron to acquire stable configuration).
Rutherford’s experiment used α-rays which are helium nuclei.
According to Pauli exclusion principle, an orbital cannot accommodate more than two electrons and those too with opposite spin.
No. of orbitals in a sub-shell = 2l + 1. Each of these can have one electron having the same value of spin.
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