Q15 of 181 Page 302

Name the element which is in :

(a) first group and third period


(b) seventeenth group and second period.

(a) The element in the first group and third period is Sodium.

(b) The element in the 17th group and 2nd period is Fluorine.


More from this chapter

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13

How does the valency of elements change on moving from left to right in the third period of the periodic table ?

 14

How does the valency of elements vary in going down a group of the periodic table ?

 16

How do electronic configurations of elements change in second period of periodic table with increase in atomic numbers ?

 17

Arrange the following elements in increasing order of their atomic radii.

Li, Be, F, N