1
Q
Atom
A
A tiny particle
2
Q
Element
A
A substance made up of only one type of atom.
3
Q
The three subatomic particles
A
Protons, neutrons and electrons
4
Q
Atomic number
A
The number of protons in the atom of that element
5
Q
Mass number
A
The total number of protons and neutrons in an atom.
6
Q
Electronic configuration
A
Describing the location of electrons in an atom
7
Q
Isotopes
A
Atoms with the same number of protons but different numbers of neutrons.
8
Q
Periodic table
A
A table that groups elements to show patterns in their properties.
9
Q
Group 1
A
the alkali metals
10
Q
Group 2
A
The alkaline earth metals
11
Q
Group 7
A
The halogens
12
Q
Group 8
A
The noble gases
13
Q
Alloy
A
A mixture of metals
