1. Atoms, Elements, Compounds And Mixtures

Question 1

Atoms,elements and compounds

Answer 1

All substances are made up of ATOMS.
An ATOM is the smallest part of an ELEMENT.
An ELEMENT is made up on one atom only.
A COMPOUND contains two or more ATOMS of an ELEMENT.

Question 2

Equations

Answer 2

There are two different equation types:

Word or Balanced symbol.

The REACTANTS are on the left side and the PRODUCTS are on the right side.

Question 3

Separating mixtures

Answer 3

MIXTURES include two or more elements or compounds.

Question 4

Define Filterisation

Answer 4

It separate soluble solids from insoluble solids.

Question 5

Define crystallisation

Answer 5

It is used to separate a soluble solid from a solution.

Eg.

Salt crystals from salty water.

Question 6

Define simple distillation

Answer 6

Used to obtain a solvent from a solution.

Question 7

Define fractional distillation

Answer 7

Used to separates mixtures at different boiling points.

Question 8

Define Chromatography

Answer 8

Used to separate different coloured mixtures.