MCQ
Which is correct
- A$Z = 72 : p$ block
- B$Z = 91 : d$ block
- C$Z = 85 : f$ block
- ✓None
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$A : 1s^2\, 2s^2\, 2p^6$
$B : 1s^2\, 2s^2\, 2p^6\, 3s^2\, 3p^3$
$C : 1s^2\, 2s^2\, 2p^6\, 3s^2\, 3p^5$
