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:
(a) The number of electrons in their atoms
(b) The sizes of their atom
(c) Their metallic characters
(d) Their tendencies to lose electrons
(e) The formula of their oxides
(f) The formula of their chlorides
Answers
Answer:
(a) Element Q has more no' of electrons because along a period more no' electrons are added to the same shell as the preceding element contains.
(b) Element P is of bigger size than element Q because along a period atomic size or radii decreases due to an increase in the nuclear charge.
(c) Element P possesses a high metallic character than element Q because along a period the non-metallic character increases due to an increase in the electrostatic force of nucleus on the electrons.
(d) Element P has a high tendency to release electrons because of its small nuclear charge than element Q
(e) Element P → P2O,
Element Q → QO
(f) Element P → PCl
Element Q → QCl2
Explanation:
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: (a) The number of electrons in their atoms (b) The sizes of their atoms (c) Their metallic character (d) Their tendencies to lose electrons (e) The formula of their oxides (f) The formula of their chlorides Characteristic Comparison (a) The number of electrons in their atoms The number of electrons in Q is more compared to P (Q > P). (b) The sizes of their atoms The size of atom P is more than atom Q (P > Q). (c) Their metallic character P is more metallic than Q (P > Q). (d) Their tendencies to lose electrons P will lose electrons more easily than Q. (e) The formula of their oxides Oxide of P is P2O. Oxide of Q is QO. (f) The formula of their chlorides Chloride of P is PCl. Chloride of Q is QCl2.