Question

Predict the formula of a stable binary compound that would be formed by the combination of the following pairs of elements 1) sodium and oxugen 2)silicon and chlorine 3)boron and fluorine 4)aluminium and oxygen

Answer 1

Dear Student,

1) Sodium is an element of group-1. It has only one electron in its valence shell therefore, its valency is 1. Oxygen is a group-16 element with a valency of 2. Therefore, the formula of the compound formed would be Na₂O.

2)​Silicon is an element of group-14 with a valency of 4. Chlorine is a group-17 element with a valency of 1. Therefore, the formula of the compound formed would be SiCl₄.

3​)​ Boron is an element of group-13 with a valency of 3. Flourine is a group-17 element with a valency of 1. Therefore, the formula of the compound formed would be BF₃.

4​)​Aluminium is an element of group-13 with a valency of 3. Oxygen is a group-16 element with a valency of 2. Therefore, the formula of the compound formed would be Al₂O₃.