Chemistry

Question 1

What are the noble gases?

Answer 1

Helium, neon, argon, krypton, xenon, radon.

Question 2

What are the non-metals?

Answer 2

Helium, boron, carbon, nitrogen, oxygen, fluorine, neon, phosphorus, sulfur, chlorine, argon, bromine, krypton, iodine, xenon, astatine, radon.

Question 3

Define an element.

Answer 3

An element is a pure substance that cannot be simplified. Elements are made up of one kind of atom only.

Question 4

Define a compound.

Answer 4

A compound is a pure substance that can be simplified (broken into smaller substances such as elements). Compounds are made up of two or more elements chemically combined in a fixed ratio.

Question 5

Define a mixture.

Answer 5

A mixture consists of a number of components (which may be compounds, elements or mixtures) together that are not chemically joined and not in a fixed ratio. Mixtures are not pure - they are made up of different particles.