Two elements 'P' and 'Q' belong to the same period of the modern periodic table and are in Group -1 and Group -2 respectively.
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 their following characteristics in tabular form :
(i) The number of electrons in their atoms
(ii) The sizes of their atoms
(iii) Their metallic characters
(iv) Their tendencies to lose electrons
(v) The formula of their oxides
(vi) The formula of their chlorides
1 Answers
| Sr. No. | Property | P | o |
| (i) | No. of electrons in the atom | 3
11 19 |
4
12 20 (any one pair) |
| (ii) | Size of the atom | Bigger | Smaller |
| (iii) | Metallic character | More metallic | Less metallic |
| (iv) | Tendency to lose electrons | More | More |
| (v) | Formula of oxides | P2O | QO |
| (vi) | Formula of chlorides | PCI | QCl2 |
Note: For parts (v) and (vi) examples using symbols of elements may also be accepted.
Detailed Answer:
(i) P has 1 valence electron, Q has 2 valence electrons.
(ii) 'P' is bigger than 'Q'.
(iii) 'P' is more metallic than 'Q'.
(iv) 'P' has more tendency to lose electrons than 'Q'.
(v) P2O and QO are formulae of their oxides.
(vi) P Cl and Q Cl2 are formulae of their chlorides.