QUESTION 3: MATTER and MATERIALS K
3.1
Potassium is a group 1 element whose ion can be represented as
(a) How many protons does the above ion have?
(b) How many electrons does the lon have?
(c) Give the number of valence electrons in this ion.
(d) Give the mass number of the ion. 30
(e) Give the number of shells in this ion.
3.2
How many protons would a potassium atom whose lon is given in
Q.4.1 have?
(1)
(1)
3.3
Give a name which is generally used to refer to Rows in the periodic table.
3.4
Give a name which is generally used to refer to Columns in the periodic
(1)
table.
3.5
Oxygen is a gas and sulphur is a solid. Why is sulphur in the same group
as oxygen?
(2)​