Question

you have provided with the following sets of elements.
a) magnesium
b) lithium
c) calcium
d) aluminium
e) potassium
f) sodium


i) which elements belong to same period
ii) which elements belongs to same group

Answer 1

(sodium potassium and lithium) ; (calcium magnesium) belong to one group respectively

sodium potassium aluminium and magnesium belong to same period