2 elements x and y belong to the group 1 & 2 in the same period . compare them with valencies,number of valences,metallic character,atomic size,formula of their chlorides,formula of their sulphates.
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(i) The number of valence electrons in element X is 1.
The number of valence electrons in element Y is 2.
(ii) The valency of an element is determined by the number of electrons in the outermost shell. Thus, the valency of element X is 1 and that of element Y is 2.
(iii) Element X is more metallic than element Y.
(iv) The size of atom X is more than that of atom Y.
(v) The formula of oxide of element X is X2O and that of element Y is YO.
(vi) The formula of chloride of element X is X Cl and that of element Y is YCl2.
The number of valence electrons in element Y is 2.
(ii) The valency of an element is determined by the number of electrons in the outermost shell. Thus, the valency of element X is 1 and that of element Y is 2.
(iii) Element X is more metallic than element Y.
(iv) The size of atom X is more than that of atom Y.
(v) The formula of oxide of element X is X2O and that of element Y is YO.
(vi) The formula of chloride of element X is X Cl and that of element Y is YCl2.
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(a) Their valencies are +1 and +2 respectively
(b) Their valences are 1 and 2 respectively
(c) The metallic character of group 1 is greater than group 2
(d) The atomic size of group 1 is greater than group 2
(e) MCl and MCl₂ respectively
(f) M₂SO₄ and MSO₄ respectively
(b) Their valences are 1 and 2 respectively
(c) The metallic character of group 1 is greater than group 2
(d) The atomic size of group 1 is greater than group 2
(e) MCl and MCl₂ respectively
(f) M₂SO₄ and MSO₄ respectively
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