Worksheets⚛Ions⚛
Total questions: 10
Worksheet time: 2mins
Lithium forms the ion Li+. This means...
... it gains 1 electron
... it loses 1 electron
... it gains 1 proton
... it loses 1 proton
Potassium (atomic number = 19) forms the ion K+. How many electrons does the ion have?
39
20
19
18
Fluorine forms the ion F-. This means ...
... it gains 1 electron
... it loses 1 electron
... it gains 1 proton
... it loses 1 proton
Oxygen (atomic number 8) forms the ion O2-. How many electrons does the ion have?
16
10
8
6
Aluminium loses 3 electrons. It's symbol is...
Al3-
Al3+
Bromine gains 1 electron. It's symbol is...
Br+
Br-
Sulphur (atomic number 16) forms the ion S2-. How many electrons does the ion have?
32
20
18
16
Magnesium (atomic number 12) forms the ion Mg2+. How many electrons does the ion have?
24
14
12
10
Nitrogen (atomic number 7) forms the ion N3-. How many electrons does the ion have?
14
10
7
4
Scandium (atomic number 21) forms the ion Sc3+. How many electrons does the ion have?
45
24
21
18
