Answer
a. Calcium is an earth alkaline metal.This element is important for bones and teeth and also helps muscle contractions and nerve impulses
b. Iron is a transition metal.This element is a component of hemoglobin
c. potassium is an alkali metal.This element helps on nerve impulses and muscle contractions
d. chlorine is a halogen. this element can be found in fluids outside cells
Work Step by Step
To answer this question, you need to study the groups on the periodic table (figure 4.3) pages 106 and 107
group 1A -alkali metals
group 2A-Alkaline Earth metals
group 7A- halogens
groups 3B to 2B- transition elements
to know their importance, study table 4.4 on page 109