Chemistry- Definitions

Question 1

Atom

Answer 1

The smallest building block of matter contains protons, electron and neutrons that cannot be broken down any further.

Question 2

Element

Answer 2

A material that consists of atoms of only one kind.

Question 3

Compound

Answer 3

A material that consists of two or more different elements that have been chemically bonded. They can be broken down by chemical means.

Question 4

Molecule

Answer 4

A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Question 5

Diatomic molecule

Answer 5

Molecule that are composed of only two of the same element.

H, N, F, O, I, Cl, Br

Question 6

Mixture

Answer 6

Two or more substances which have been combined such that each substance retains its own chemical identity. Can be separated by physical means.

Question 7

Pure substance

Answer 7

Made of only one type of molecule,

Question 8

Impure substance

Answer 8

A mixture of two or more types of molecules that has no definite composition.