Question

Among the elements 2He4,7N14,12Mg24,and 4Be8,the elements which belongs to same period in the modern periodic table are​

Answer 1

Answer:

Option D or 4Be8 and 12Mg24

Explanation:

Electronic configuration of Be is

2,2

Therefore it's group will be 2nd group

Electronic configuration of Mg is

2,8,2

Therefore it's group will be 2nd group

Hence both belong to the same group

Answer 2

Explanation:

the correct answer is D) 4Be8 and 12Mg24.