Explanation:
Elements of group 1 represented in the blue column are alkali metals.
Elements of group 2 represented in the peach column are alkaline earth metals.
Elements from scandium to zinc or all the elements represented in the green columns are transition metals.
Elements in coral pink boxes represent metalloids, that is, they show properties of both metals and non-metals.
Elements present in blue, peach, green and coral pink boxes are all metals.
Whereas elements present in pink, that is, group 18 are all noble gases.
And elements present in yellow boxes are all non-metals.