Question Category: Atoms and molecules

Name two scientists who established the laws of chemical combination?

Antoine L. Lavoiser and Joseph L. Proust.

Give an example of a triatomic molecule of an element.

Ozone (O3).

Define atomicity.

It is the number of atoms present in one molecule of a substance.

Write the atomicity of the following molecules Sulphur (ii) Phosphorus

(i) 8 (ii) 4

what is an ion? Give one example.

The negatively and positively charged particles are called ions.

Give one word for the following: (i) A group of

(i) Ion (ii) Cation

The atomic number of three elements A, B and C

Electronic configuration of A : 2,7 Electronic configuration of B : 2,8 Electronic configuration of...

What is wrong in saying one mole of nitrogen?

The statement does not clarify whether we are talking about atoms or molecules of nitrogen....

Dalton’s atomic theory is contradicted by the formula of sucrose

Dalton’s atomic theory states that atoms of different elements combine together in simple whole number...

How many times heavier is one atom of carbon than

Atomic mass of carbon = 12 u Atomic mass of oxygen = 16 u Therefore,...