State
the bonding & state of chlorides of period-3 - group 1 [IA], 15 [VA], 16 [VIA]

State the bonding & character of oxides of period-3 - group 1 [IA], 13 [IIIA] and 16 [VIA].

State the type of elements present in group 1 [IA]

State the reason for periodicity of elements in periods and groups.

State the type of elements present in group 13 to 16 [IIIA to VIA]

Draw the geometrical atomic structure representing the electronic configuration of atoms of elements of [a] Period- 2 [i] group 14[IVA] - carbon [at. no. 6] [ii] group 15[VA] - nitrogen [at. no. 7] [iii] group 16 [VIA] - oxygen [at. no. 8] [b] Period - 3 [i] group 1[IA] - sodium[at. no. 11] [ii] group 2[IIA] - magnesium[at. no. 12] [iii] group 17[VIIA] - chlorine[at. no. 17] [c] Period - 4 [i] group 2[IIA] - calcium [at. no. 20].

Name or state with reference to the elements of the modern periodic table. The bonding [i.e. electrovalent or covalent) of the oxide of the element in period-3 group 16 [VIA].

Name or state the following with reference to the elements of the first three periods of the periodic table. Bridge elements of Period 3 of Group 1, 2 and 3.

Name or state with reference to the elements of the modern periodic table. The character of the hydroxide of the element in period-3 group 13 [IIIA].

State Mendeleev.s periodic law.

State variation in number of shells in Period