Question

name the group in which you would place the elements with atomic no 10 and 12​

Answer 1

Answer:

The element with atomic no. 10 will be placed in the 18th group

and the element with atomic no. 12 will be placed in the 2nd group

Explanation:

the electronic configuration of the element with atomic no. 10 : 2, 8

No. of valence electrons : 8

group no. : 10 + 8 = 18

the electronic configuration of the element with atomic no 12 : 2, 8, 2

No. of valence electrons : 2

group no. : 2

This is because, if the no. of valence electrons is 1, or 2 then the group no remains equal to the no. of valence electrons. But if the no. of valence electrons is more than 2

then the group no. = no. of valence electrons + 10

Hope it helps you

Answer 2

Answer:

••Atomic number 12(Mg) = 2nd group { Alkaline earth metals}

••Atomic number 10(Ne) = 18th group { Halogens}

Explanation:

As we know, Elements are in Modern periodic table are arranged according to there atomic number.

Elements are arranged according to electrical configuration of atomic number of an element .

For example:- Lithium has atomic number 3.

thus, electrical configuration of lithium is 2,1.....

so, lithium is placed in 1st group ( alkali metal)....

And there is one formula to find the group .....

Group number = Number of valance electrons + 10

Now,

Atomic number 12 (Mg) has electrical configuration = 2,8,2 ..so, It is placed in 2nd group......

[ group number = 2 + 10 => 12 ]

Atomic number 10 ( Ne) has electrical configuration =2,8 ...so, it is placed in 18th group (Noble gases or inert gases)....

[ group number = 8 + 10=>18

◆◆◆I hope it helps you◆◆◆