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The number of electrons and neutrons of an element is 18 and 20 respectively. Its mass number is:
(1) 17
(2) 37
(3)2
(4)38
Ans: 17
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For azimuthal quantum number l= 3 , the maximum number of electrons will be: (1) 2 (2) 6 (3) 0 (4) 14 Ans: 14
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