Which is the best reason that the atomic radius generally increases as you
go down in each group of elements?
- The nuclear charge increases
-The number of neutrons increases.
- The number of energy level increases
- A new octet forms

As you down the a periodic group, the atomic radius increases because there is an increase in the energy levels. This increase is evident by the addition of subsequence electronic shell down the group.

The atomic radius is half of the internuclear distance between two covalently bonded atoms of non-metallic elements.
it is also half the distance between two nuclei in the solid state of metals
Atomic radius increases down a group due to successive shells being added.
The new shells compensates for the size reducing effect of the increased nuclear charge

Which is the best reason that the atomic radius generally increases as you go down in each group of elements? - The nuclear charge increases -The number of neutrons increases. - The number of energy level increases - A new octet forms

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Which is the best reason that the atomic radius generally increases as you
go down in each group of elements?
- The nuclear charge increases
-The number of neutrons increases.
- The number of energy level increases
- A new octet forms