Question

Is the following sentence true or false?

The first elements to be identified were mainly gases.
a) True
b) False

Answer 1

The sentence 'The first elements to be identified were mainly gases' is true. Gases were the first elements to be identified because they are easier to observe and study due to their predictable physical properties.

Step-by-step explanation:

The sentence "The first elements to be identified were mainly gases" is true.

Gases were the first elements to be identified because they are easier to observe and study due to their predictable physical properties. In fact, the study of the properties of gases was the beginning of the development of modern chemistry. Gases have no definite shape or volume, and they tend to fill whatever container they are in. They can also compress and expand easily.