Question

N- shell of an element 'Y' os having 2 electrons. Find its atomic number? Give plausible explanation to your answer​

Answer 1

Answer:

20

Explanation:

As we know that the 'n' shell is the fourth shell of an atom and since it is having 2 electrons in its 'n' shell ,so it electronic configuration should be 2,8,8,2 and therefore 20 is the atomic number.