The following table shows the position of five elements A, B, C, D and

1.	The following table shows the position of five elements A, B, C, D and E in the modern periodic table.Group\(\rightarrow\) Period ↓123 to 121314151617182ABC3DEAnswer the following giving reasons: (i) Which element is a metal with valency two? (ii) Which element is least reactive? (iii) Out of D and E which element has a smaller atomic radius?
Answer» (i) D, As it is on the left side of the table in group 2 (ii) C, as it is in the group 18/ Noble gas (iii) E, as we move from left to right across a period, atomic radius decreases

The following table shows the position of five elements A, B, C, D and E in the modern periodic table.Group\(\rightarrow\) Period ↓123 to 121314151617182ABC3DEAnswer the following giving reasons: (i) Which element is a metal with valency two? (ii) Which element is least reactive? (iii) Out of D and E which element has a smaller atomic radius?

Answer»

(i) D, As it is on the left side of the table in group 2

(ii) C, as it is in the group 18/ Noble gas

(iii) E, as we move from left to right across a period, atomic radius decreases

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