Question

Element A,B,C and D have atomic number 11,8,1 and 17 respectively . Give the
Formula of the Compound formed between (a) A and B   (b)  B and C

Answer 1

the elements are :

A:Na

B:O

C:H

D:Cl

a) 2Na+O2=2NaO

b)O2+2H2=2H2O