Unit 2- Elements, Compounds And Experimental Techniques

Question 1

Element

Answer 1

A substance that cannot be decomposed into anything simpler by chemical means. It is a substance made up of atoms all of which have the same atomic number

Question 2

Compound

Answer 2

A substance which contains two or more elements chemically combined in fixed proportions by mass

Question 3

Mixture

Answer 3

Contains two or more substances (elements or compounds) which can be present in variable proportions

Question 4

Substance

Answer 4

A general term that refers to elements, mixtures and compounds

Question 5

Solution

Answer 5

A liquid which contains a substance or substances dissolved in it

Question 6

Solvent

Answer 6

A pure liquid

Question 7

Solute

Answer 7

The dissolves substance in a.solution

Question 8

Chromatography

Answer 8

Can be used to separate the components of solutions which contain several dissolved substances

Question 9

Dissolving,filtration and crystallisation

Answer 9

Methods used to separate a mixture of two solids

Question 10

Simple distillation

Answer 10

Separating a pure liquid from a solution