Chemistry Year 9 topic 1- Elements, Compounds and Mixtures

Question 1

What is an Element?

Answer 1

Elements are materials that cannot be separated into anything simpler by chemical methods. They contain 1 type of atom.

Question 2

What is a Compound?

Answer 2

A material that has two or more different atoms chemically joined together.

Question 3

What is a Mixture?

Answer 3

A mixture has two or more substances mixed together. They are not chemically combined so can be physically separated.

Question 4

Properties of metals?

Answer 4

Hard, good conductor of electricity and heat, high density, malleable and high melting point.

Question 5

Soluble

Answer 5

A solid that dissolves easily in a liquid e.g. sugar, salt

Question 6

Insoluble

Answer 6

A solid that doesn’t dissolve easily in a liquid solvent e.g. sand.

Question 7

Solute

Answer 7

A solid that dissolves.
This is a substance that changes its state during a dissolving process i.e. the substance that dissolves e.g.
salt, sugar

Question 8

Solvent

Answer 8

This is a substance that doesn’t change its state during a dissolving process i.e. a substance in which the solute dissolves e.g. water

Question 9

Solution

Answer 9

A mixture containing the solute and solvent

solution = solvent+solute

Question 10

Residue

Answer 10

Solid particles trapped in filter paper e.g. sand

Question 11

Filtrate

Answer 11

Liquid particles that pass though the filter paper

Question 12

Distillate

Answer 12

The liquid that condenses during distillation and is collected

Question 13

Miscible

Answer 13

A liquid that mixes easily in another liquid e.g. ethanol and water

Question 14

Immiscible

Answer 14

A liquid that doesn’t mix easily in another liquid e.g. oil and water