How does the size of the atom change?

Answer 1

the further you go down the family, the larger the atoms get, because they have mroe shells and thus they need more space to fit those shells.
As you go down a group in the Periodic Table, the atomic radius increases.

Answer 2

The size of an atom generally decreases as you move from left to right across a period in the periodic table due to increased nuclear charge. However, as you move down a group, the size of an atom tends to increase due to the addition of more electron shells.

Answer 3

As you move down in groups there is an extra electron orbital for each group moved down so in turn it is bigger

Answer 4

Atomic size decreases across periods going from left to right because the addition of protons to the nucleus contracts the electrons around the atom.

From Bluee