Question

the elements present in group 1 and 2 on the left side and the groups 13 and 17 on the right side of the periodic table are called​

Answer 1

Answer:

1 group is called alkali metal

2 group is called alkaline earth metal

13 group is called boron family

17 group is called halogens

Answer 2

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The elements which present in group 1 is called alkalis metals.

Because ,they have properties to form alkalis .They have only one electron in their valence shell.

Ex :- Na, H, Li, k,Rb,cs .

The elements which presents in group 2 is called earth alkalis metals.

They have two electrons in their last

shell.

Ex:- Be, Mg, Sr, Ba .

The elements which belongs to group 13 is called boron group they have three electrons in their last shell.

Ex:- B, Al, In, Tl

The elements which belongs to group 17 is called halogens.

They are reactive among all elements.

They have last electrons in their outermost shell.

Ex:- F, Cl, Br, I