Question

Select the correct answer from each drop-down menu.

What is the chemical name of this compound?

Na2S:

Answer 1

Answer: sodium sulphide.

Step-by-step explanation:

`Na_2S` is an ionic compound because sodium element is a metal and sulphur element is a non-metal. The bond formed between a metal and a non-metal is always ionic in nature.

The nomenclature of ionic compounds is given by:

1. Positive is written first.

2. The negative ion is written next and a suffix is added at the end of the negative ion. The suffix written is '-ide'.

Hence, the name of
`Na_2S` is sodium sulphide.

Therefore, the correct answer is sodium sulphide.

Answer 2

Sodium Sulphide.

Step-by-step explanation:

The chemical name is sodium sulphide. The valency of the sulphide ion is 2 while the valency of sodium is 1 . That is why the molecule contains 2 sodium ions.