Question

An atom has electronic configuration 1s2 2s2 2p6 3s2 3p6 3d3 4s2 you will place it in

Answer 1

The atomic configuration given =  1s2 2s2 2p6 3s2 3p6 3d3 4s2

We know that for neutral atoms the number of electrons is equal to the atomic number of the element.

Total no of electron = 2+2+6+2+6+3+2 = 23

=> atomic number of this element is 23

This number corresponds to Vanadium which is a transition metal located in fourth row, group 5 of the periodic table.

Answer 2

Answer:

fifth

bcoz the last electrons r entering 3d3 n 4s2...so total valence electrons is equal to 5