which of the following factors contributes to the increase in atomic size within a geoup in the periodic table as the atomic number increases

The increase in atomic size within a group on the periodic table as the atomic number increases is a result of the successive shells of electrons being added. The size of an atom is estimated using the atomic radius.

Down a group, from top to bottom, atomic radii increases.
This due to the successive shells of electrons being added.
The shells have been more than compensated for by the size reducing effect of the increased nuclear charged.
As with most atoms, the inner electronic shells tends to screen/shield the outermost electrons from experiencing the nuclear attractions.
The screening effect tends to reduce the atomic size.
Atomic number is the number of protons in an atom. For a neutral atom, it is the same as the number of electrons.
As the atomic number increases down a group, the number of electrons also increases and the atomic radii expands.

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which of the following factors contributes to the increase in atomic size within a geoup in the periodic table as the atomic number increases​

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which of the following factors contributes to the increase in atomic size within a geoup in the periodic table as the atomic number increases