Chemistry, asked by big427042, 1 month ago

one element A is a member of group 2 and belong to 3rd period, find the atomic number

Answers

Answered by subhamkumarmeher4

1

Answer:

12

Explanation:

Group 1 Group 2

1st period 1H

2nd period 3Li 4Be

3rd period 11Na 12Mg

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