Two elements 'P' and 'Q' belong to the same period of the modem periodic table and are in Group-1 and Group-2 respectively. Compare their following characteristics in tabular form:
(a) The number of electrons in their atoms
(b) The sizes of their atoms
(c) Their metallic characters
(d) Their tendencies to lose electrons
(e) The formula of their oxides
(f) The formula of their chlorides
Characteristics | P | Q |
(a) No. of electron in their atoms | Since P belongs to group 1 and Q belongs to group 2, therefore, P will be having Less number of electrons than Q. There number of electrons in element P can be either 3 or 11 or 19 | Since P belongs to group 1 and Q belongs to group 2, therefore, Q will be having more number of electrons than P. There number of electrons in element Q can be either 4 or 12 or 20 More than P 4 12 20 (any one pair) |
(b) Size of the atom | The atomic size of element P will be larger than Q. | The atom size of element Q will be smaller than P. |
(c) Metallic character | P will have more metallic character than Q. | The element Q will be less metallic than element P. |
(d) Tendency to lose electrons | P will have more tendency to lose electrons due to its large atomic size. | Q will have less tendency to loose electrons as forces of attraction between nucleus and valence electrons will be strong due to smaller atomic size. |
(e) Formula of their oxides | The valency of P is 1 and Oxygen is 2, so the formula of their oxide will be: P2O | The valency of Q is 2 and Oxygen is also 2. Therefore, the formula of oxide will be: QO |
(f) Formula of their chlorides | The formula for chloride will be: PCI | The formula for chloride will be: QCI2 |
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