Two elements 'X' and 'Y' belong to the second group of the Periodic Table. 'X' has 2 shells and 'Y' has 3 shells in it. (a) Which of these is more metallic in nature and why? (b) What is the formula of the chloride of 'X' and sulphide of 'Y' ? (c) Is the valency of 'X' same as that of 'Y' or different? Why?

Two elements 'X' and 'Y' belong to the second group of the Periodic Ta

1.	Two elements 'X' and 'Y' belong to the second group of the Periodic Table. 'X' has 2 shells and 'Y' has 3 shells in it. (a) Which of these is more metallic in nature and why? (b) What is the formula of the chloride of 'X' and sulphide of 'Y' ? (c) Is the valency of 'X' same as that of 'Y' or different? Why?
Answer» Solution :(a) Y is more metallic in NATURE. As we move down the group, the valence ELECTRONS get farther from the NUCLEUS. The hold of the nucleus on the valence electrons decreases. Thus electrons can be removed more easily. In other words, metallic character increases down the group. `XCI_2` and YS (c ) X has the same valency as Y which is EQUAL to 2. This is because both have 2 electrons in the valence SHELL.