JAMB - Chemistry (2015 - No. 60)
S block elements of the periodic table one made up of
groups 1, 2, 3
groups 1, and 2
group 3
group 3 to 7
Vysvětlení
S block elements only are made up of group 1 and 2 options A,C,D takes place of the other blocks in the periodic table p,d,f etc.