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An element X has mass number 40 and contains 21 neutrons in its atom. To which group of the Periodic Table does it belong? (a) Group 1 (b) Group 4 (c) Group 2 (d) Group 3

An element X has mass number 40 and contains 21 neutrons in its atom. To which group of the Periodic Table does it belong?
(a) Group 1
(b) Group 4
(c) Group 2
(d) Group 3

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 8741 Points
27 days ago
Answer: a Explaination: Reason. e = 19 (2, 8, 8,1)

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