C2 The periodic table

Question 1

alkali metal

Answer 1

elements in Group 1 of the periodic table

Question 2

halogens

Answer 2

the elements found in Group 7 of the periodic table

Question 3

transition element

Answer 3

element from the central block of the periodic table

Question 4

universal indicator

Answer 4

a mixture of indicators that can change through a range of colours to show how strongly acidic or alkaline liquids and solutions are