Question

An element X has atomic number 19. To which group and period does X belong? Is it metal or non metal

Answer 1

The atomic number is 19

This means the electronic configuration is -2,8,8,1

As the number of valence electron(elctron in valence shell)is 1 therefore the electron belongs to Group 1

Also the numbets of major shells is 4,and ad the number of major shells determine the period of the element so the element belong to 4th period

Thus to summon the things in one line:-the elemnt belongs to period 4 of group 1

@skb

Answer 2

Group no.1 And period no.4