Question

based on the valency of elements write the molecular formula of oxide of first group elements ​

Answer 1

molecular formula will be R²O. where R is the element of first group.

For example Na²O.

Answer 2

the first group elements are hydrogen, lithium, sodium, potassium, rubidium, francium, caesium

its oxides are ......

H20

LI20

NA2O

K20

RB2O

Fr2O

Cs2O