Question

The number of electrons in the third shell (M) is same as that of first shell (K). Identify the element:​

Answer 1

Answer:

in first shell there is 2 electrons and in m shell there is18 but we use only 8 shell like sodium 2,8,1

Answer 2

Answer is Magnesium because in K shell it has 2 and in M shell it has 2 .