(a) Name the method by which alkali metals can be extracted.

(b) What is the colour of the flame of sodium and potassium?

Arrange the following

(a) Elements of group 1, in increasing order of reactivity.

(b) Elements of group 17, in decreasing order of reactivity.

(c) He, Na, Mg (decreasing order of valency).

(d) Chlorine, sodium, magnesium (increasing reducing character).

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?