Explanation:
Chemical properties are defined as the properties which tend to show change in chemical composition of a substance.
For example, toxicity, reactivity, combustion etc are all chemical properties.
It is known that elements which belong to same period show similar chemical properties.
This is because elements that lie in the same group have same number of valence electrons. Hence, they tend to show same type of reactivity which makes them exhibit similar chemical properties.
Thus, we can conclude that elements in group via (group 16) have similar properties because they all have 6 valence electrons.
