Question

please tell correct answers​

Answer 1

Explanation:

1. Groups or Families

2.Periods

3.Alkali metals

6.2 elements

7.Bridge elements

8.6th and 7th periods

9.7th period

Answer 2

•|| Required ||•

(i) Vertical columns are known as groups.

(ii) Horizontal rows are called periods.

(iii) Group 1 elements are known as Alkaline metals

(vi) Number of elements in first period is 2.

(vii) Elements of second period are known as Alkaline earth metals.

(viii) Longesr period of periodic table is sixth.

(ix) Incomplete period of a periodic table is seventh.

Hope it helps you....