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Two elements X and Y belong to groups 1 and 2 respectively in the same period of periodic table. Compare them with respect to: periodic table from the left to the right and why?

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Two elements X and Y belong to groups 1 and 2 respectively in the same period of periodic table. Compare them with respect to:

periodic table from the left to the right and why?

1. the number of valence electrons in their atoms

2. their valencies

3. metallic character

4. the sizes of their atom

5. formulae of their oxides

6. formulae of their chlorides

1 Answer
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1. ‘X’ has 1 valence electron, Y has 2 valence electrons.

2. ‘X’ has valency equal to 1, V has valency equal to 2.

3. ‘X’ is more metallic than Y.

4. ‘X’ is bigger than Y.

5. X2O and YO are formulae of their oxides.

6. YCI2 are formulae of their chlorides.

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