Question

An atom 'A' belongs to IIIA group and another element 'B' belongs to VIIA group. The formula of the compound formed is​

Answer 1

Answer:

AB₃

Explanation:

For Atom A:

• Atom A belongs to group III A.
• So, the element will have a valency of +3.
• This includes all elements that comes under the Boron in periodic table.

For Atom B:

• Atom B belongs to group VII A.
• So, the element will have 7 electrons in its outermost shell which means that its valency is -1.
• This includes all elements that comes under Fluorine in periodic table.

From the valencies of atom A and B, it can be found out that:

★ A is a metal (because of positive valency)

★ B is a non-metal (because of negative valency)

The formula of the compound formed will be:

【AB₃】