With reference to period 3 of the periodic table - State:
The electronic configuration of the element whose hydroxide is a weak base.

With reference to period 3 of the periodic table - State: The type of bonding of the element with electronic configuration 2, 8, 7.

With reference to period 3 of the periodic table - State: The number of electrons in the penultimate shell of the element with valency -1.

With reference of first three periods of the periodic table. Noble gas with electronic configuration of 2,8 .

With reference to period 3 of the periodic table - State: The nature of the oxide of the alkaline earth metal in the period.

With reference to period 3 of the periodic table - State: The formula of the chloride of the element with electronic configuration 2, 8, 4.

With reference of first three periods of the periodic table. Valency of elements in group 17

With reference of first three periods of the periodic table. Metalloid in 3rd period

The following questions refer to the Periodic Table : What is the common feature of the electronic configurations of the elements in group 17 ?

Atomic number of few elements are given below 10, 20, 7, 14 (a) Identify the elements (b) Identify the group number of these elements in the periodic table (c) Identify the periods of these elements in the periodic table (d) What would be the electronic configuration for each of these elements (e) Determine the valency of these elements.

An element X belongs to 3rd period and group II of the periodic table . State : Name of the elements.