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The atomic number of an element is 35 and mass number is 81. The number of electrons in the outer most shell is:
(1) 7
(2) 6
(3) 5
(4) 3
Ans: 7
Energy of atomic orbitals in a particular shell is in the order: (1) s (2) s> p > d > f (3) p (4) f > d > s >p Ans: s
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