Keywords

Question 1

Atom

Answer 1

does not dissolve in a liquid

Question 2

Element

Answer 2

a substance made up of only one type of atom.

Question 3

Chemical symbol:

Answer 3

The letter or letters used on the Periodic table to represent elements

Question 4

Subatomic particles:

Answer 4

the small particles that make up an atom

Question 5

Protons:

Answer 5

a Positively charged particle located in the nucleus of an atom

Question 6

Neutrons

Answer 6

A neutrally charged particle located in the nucleus of the atom

Question 7

Electrons

Answer 7

A negatively charged particle, located on shells that orbit the nucleus of the atom

Question 8

Atomic number

Answer 8

A negatively charged particle, located on shells that orbit the nucleus of the atom

Question 9

Mass number

Answer 9

the total number of protons and neutrons in an atom

Question 10

Atomic structure

Answer 10

the idea proposed by Niels Bohr that electrons orbit the nucleus, in shells.

Question 11

Electronic configuration

Answer 11

Describing the location of electrons in an atom

Question 12

Istotapes

Answer 12

Atoms with the same number of protons but different numbers of neutrons

Question 13

Periodic table

Answer 13

the modern periodic table groups elements to show patterns in their properties.

Question 14

Groups

Answer 14

vertical columns of elements

Question 15

Periods

Answer 15

horizontal rows of elements across the periodic table

Question 16

Malleable

Answer 16

can be hammered into various shapes without cracking

Question 17

Ductile

Answer 17

metals can be drawn out to form a wire

Question 18

Conductor

Answer 18

alloys energy to flow through them e.g. copper

Question 19

Alloy

Answer 19

A mixture of metals e.g. copper and tin makes bronze.

Question 20

Compound

Answer 20

Substances made by joining together two or more elements

Question 21

Bond

Answer 21

strong forces that keep elements on compound together

Question 22

Mixture

Answer 22

consists of two or more substances mingled together but not chemically combined

Question 23

Molecule

Answer 23

Groups of two or more atoms bonded together

Question 24

Purity

Answer 24

Substances that contain only atoms or molecules of that substance

Question 25

Solution

Answer 25

When a solute dissolves in a solvent, the mixture is called a solution

Question 26

Solute

Answer 26

The substance that dissolves

Question 27

Solvent

Answer 27

the substance the solute dissolves into

Question 28

Insoluble

Answer 28

does not dissolve in a liquid

Question 29

Soluble

Answer 29

dissolves in a liquid

Question 30

Suspension

Answer 30

When a solute does not dissolve, it may settle on the bottom, or float through the liquid. This is called a suspension.

Question 31

Solubility

Answer 31

a measure of how much solute can dissolve in a fixed volume of solvent to make a saturated solution

Question 32

Solubility curve:

Answer 32

A graph of temperature versus solubility to show how solubility changes due to changing temperature

Question 33

Concentration

Answer 33

how much solute is dissolved in the solvent. It is measured in grams per litre.

Question 34

Dilute concentration:

Answer 34

a small amount of solute in a large quantity of solvent.

Question 35

Concentrated solution

Answer 35

A large quantity of solute in a small quantity of solvent

Question 36

Saturated solution

Answer 36

contains as much solute as possible at a given temperature

Question 37

Crystallisation

Answer 37

Crystals are formed by cooling a saturated solution. The formation of crystals is called crystallisation.