Question

An element E has 1
electron in its M shell? nhi

(i) What is its atomic number?​

Answer 1

Answer:

atomic number 24          

Explanation:

Electronic configuration of Cr (atomic number 24) =[Ne]3s  

2

3p  

6

3d  

5

4s  

1

 

Therefore number of electrons in M shell (third shell) =2+6+5=13.