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29/09/2021 8:48 pm
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The electronic configurations of four particles A, B, C and D are given below :
A 2, 8, 8
B 2, 8, 2
C 2, 6
D 2, 8
Which electronic configuration represents :
(i) magnesium atom?
(ii) oxygen atom?
(iii) sodium ion?
(iv) chloride ion?
1 Answer
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29/09/2021 8:49 pm
(i) B: Magnesium atom (At. no. = 12)
(ii) C: Oxygen atom (At. no. = 8)
(iii) D: Sodium ion (E.C = 2, 8)
(iv) A: Chloride ion (E.C = 2, 8, 8)