Chemistry Year 8

Question 1

Atom

Answer 1

Smallest unit of an element and is made up of a nucleus surrounded by electrons.

Question 2

Nucleus

Answer 2

Central part of the atom which contains protons and neutrons. It contains most of the atom’s mass.

Question 3

Proton

Answer 3

A positively charged particle which can be found in the nucleus of an atom.

Question 4

Neutron

Answer 4

A neutral particle with no charge which can be found in the nucleus of an atom.

Question 5

Electron

Answer 5

A negatively charged particle which is located on shells which surrounds the atom’s nucleus.

Question 6

Atomic number

Answer 6

The amount of protons in an atom

Question 7

Chemical symbol

Answer 7

How scientists classify elements with a unique symbol

Question 8

Ion

Answer 8

Adding or taking away an electron in order to change its charge

Question 9

Periodic Table

Answer 9

An arrangement of all elements in order of atomic number

Question 10

Periods

Answer 10

Rows on the periodic table

Question 11

Groups

Answer 11

Columns on the periodic table

Question 12

Periodic law

Answer 12

The physical and chemical properties of the elements recur at intervals, when listed in atomic weight

Question 13

Symbols

Answer 13

The chemical symbol of an element

Question 14

Atomic numbers

Answer 14

The number of protons or the number of electrons in an atom

Question 15

Atomic mass number

Answer 15

Number of protons and neutrons in an atom

Question 16

Alkali metals

Answer 16

The elements from group 1. These elements act strongly with water to form basic solutions

Question 17

Alkaline earth metals

Answer 17

The elements from group 2 of the periodic table

Question 18

Halogens

Answer 18

Elements from group 17 of the periodic table. These elements are brightly-coloured

Question 19

Noble gases

Answer 19

These gases are from group 18 of the periodic table. These elements have a full outer shell, and do not readily react with other substances

Question 20

Transition metal block

Answer 20

The group of elements in the middle block

Question 21

Metals

Answer 21

A material that is hard, shiny, and malleable

Question 22

Non-Metals

Answer 22

A substance on the periodic table that is brittle

Question 23

Metalloid

Answer 23

An element containing properties of metals and non-metals

Question 24

Lustre

Answer 24

The brightness of an element

Question 25

Conductors

Answer 25

Something that can carry an electric current

Question 26

Malleable

Answer 26

Able to be hammered without cracking

Question 27

Brittle

Answer 27

A hard object but easy to break