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Which of the following sets of quantum numbers represent an impossible arrangement:
n l m m2
(1) 3 2 - 2 (+)
(2) 4 0 0 (-)
(3) 3 2 -3 (+)
(4) 5 3 0 (-)
Ans: 3 2 -3 (+)
An element L has 9 protons and valency 1. Another element M has valency 3 and 5. What is the difference in the number of electrons in L and M ?
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