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

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Solution

Group 1 Group 2
a) One electron in the valence shell Two electrons in the valence shell
b) Larger atomic size compared to Group 2 Smaller atomic size compared to Group 1
c) More metallic in nature Comparatively less metallic
d) Highly electropositive, readily loses electron Comparatively less electropositive
e) Oxide formula: $X_{2} O$ Oxide formula: $X O$
f) Chloride formula: $X C l$ Chloride formula: $X C l_{2}$

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Question 33
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Group 1	Group 2
a) One electron in the valence shell	Two electrons in the valence shell
b) Larger atomic size compared to Group 2	Smaller atomic size compared to Group 1
c) More metallic in nature	Comparatively less metallic
d) Highly electropositive, readily loses electron	Comparatively less electropositive
e) Oxide formula: $X_{2} O$	Oxide formula: $X O$
f) Chloride formula: $X C l$	Chloride formula: $X C l_{2}$