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The correct ground state electronic configuration of chromium atom is:
(1) [Ar] 3d5 4s1
(2)[Ar]3d4 4s2
(3) [AR]3d6 4s0
(4)[Ar]4d5 4s1
Ans: [Ar] 3d5 4s1
Number of unpaired electrons in 1s 2 2s 2 2p 3 is: (1) 2 (2) 0 (3) 3 (4) 1 Ans: 3
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The ionisation potential of a hydrogen atom is -13.6 eV. What will be the energy of the atom corresponding to n= 2 . (1) -3.4 eV (2)-6.8 eV (3) -1.7 eV
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