An element belongs to the 3rd period and Group IIIA (13) of the periodic table. State

(a) the number of valence electrons,

(b) the valency,

(c) if it is a metal or non-metal?

(d) the name of the element.

An element A has 2 electrons in its fourth shell. State:

(a) its atomic number

(b) its electronic configuration

(c) its valency

(d) position in the periodic table

(e) is it a metal or a non-metal?

(f) is it an oxidising or reducing agent?

(a) Name the alkali metals. How many electrons(s) do they have in their outermost orbit.

(b) Take any one alkali metal and write its reaction with

(i) Oxygen

(ii) Water

(iii) Acid

(a) How do alkaline earth metals occur in nature?

(b) Write the electronic configuration of the first two alkaline earth metals.