Question

What happens when we go down the group of periodic table.....
1. The cells increase
2. Atomic size increase
3. Atomic size decrease​

Answer 1

Answer:

atomic size increase

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Answer 2

Answer:

An atom can be made of several shells which contain electrons that revolve around the nucleus of an atom. The shells are marked as follows, K, L, M, N, O, P. The K shell can hold upto 2 electrons, L shell can 8, M shell can hold upto 18 and so on...

Now scientists have made the periodic table as such, that if you will go down the group, then the number of shells in an atom increase. All the atoms of elements in group 1 have only one shell. Similiarly, All the atoms of elements in group 2 have 2 shells. Similiarly, In group 3, all the atoms of elements have 3 shells.

So, if the shells will increase, that means it is increasng the atomic radius of an atom. That is why atomic size increases down the group.

Explanation:

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