Question

A part of modern periodic table is given below. On its basis, answer the following questions:

Group No. →	1	2	13	14	15	16	17	18
Period ↓
2		A				B
3	E			D			F	C

Write the molecular formula of the compound formed by the combination:

E and B

Answer 1

Element E belongs to group 1 of the periodic table; hence it shows a valency of 1.

Element B belongs to group 16 of the periodic table and shows a valency of 2.

So the formula of the compound formed will be E₂B.