Question

12. Element in a group of periodic table have similar chemical properties why ?

Answer 1

Answer:

Explanation:

All the members of a family/Group of element have same number of valence electron and similar chemical properties.

Answer 2

Answer:

Explanation:

In earlier classifications

(Newlands and Mendeleev specifically)

When elements were arranged according to increasing atomic masses , periodicity was observed .

Periodicity is the repitition of similar chemical and physical properties

After that , atomic number was made the basis for periodicity and modern periodic law was made ( a modified version of periodic law given by Mendeleev )

And modern periodic table was made

(called Long form of periodic table)

So that elements with similar properties fall in same columns , called groups

Elements were arranged in the order of increasing atomic masses and similar chemical properties

The place for hydrogen in the periodic table is still not specified

It shows the properties both of Group 1 and 17

(Alkali metals and Halogens)

Hope it helps...