Question

4. Two elements P and Q belong to the same period of the modern periodic
table and are in group 1 and group 2 respectively. Compare them on the basis
of characterstic properties given below!
1)the number of electrons
2)the atomic size,
3)their metallic characters,
4)their tendency to loose electrons
5)the formula of their oxides
6)the formula of their hydrides​

Answer 1

Answer:

group 1

alkali metal

group 2

alkaline earth metal

Explanation:

no of electron is more in group 2 then group 1 .

atomic size is large in group then group 2 because the size is decreases due to increase in number of electron in each period of group 1 and 2

group 1 is more metallic then group 2

group 1 loose electron more easily then group 2

group one easily oxidised then group 2.

Na2O in group 1 and MgO in group 2

so formula is of X is metal of group 1. X2O ratio of metal and oxide ( oxygen) is 2:1

for group 2

XO ratio of metal and ocide (oxygen) is 1:1