Chemistry, asked by Answersneeded, 2 months ago

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

Answers

Answered by laxmilas1310

2

Explanation:

X belongs to Group 1. The mass number of element X is 40 and the number of neutrons in its atom is 21.

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