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Elements upto atomic number 103 have been synthesized and studied. If a newly discovered element is found to have an atomic number 106, its electronic configuration will be:
(1) [Rn] 5 f 14, 6d4, 7s2
(2) [Rn]5 f 14 6d1, 7s2, 7p3
(3) [Rn]5 f 14 6d6, 7s0
(4) [Rn]5 f 14 6d5, 7s1
Ans: [Rn]5 f 14 6d5, 7s1
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An isostere is: (1) NO -2 and O 3 (2) No -2 and PO 3- 4 (3) CO 2, N 2 O, NO - 3 (4)Clo - 4 and OCN - Ans: NO -2
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