Answer and Explanation:
(a) Alkali metals : The group 1 element in periodic table are known as alkali metals two examples are sodium (Na) , potassium (K)
(B) Alkaline earth metals : The group 2 elements are known as alkaline earth metals examples are calcium (Ca), magnesium(Mg)
(c) Halogens : group 17th element are known as halogens examples are chlorine (Cl) , fluorine (F)
(D) Noble gases : the group 18th elements are known as noble gases examples are argon (Ar) ,Helium (He)
(E) Chalcogens : The group 16th elements are known are chalcogens the examples are sulpher (S), oxygen (O)
(F) Transition metals : they are found in the middle of the periodic table examples are nickle (Ni) Copper (Cu)
