Question

What do you think is the reason for an increasing atomic radius within one group?

Answer 1

Answer:

As you go down a group on the periodic table, you get more electron shells and therefore a larger atomic radius.

Answer 2

Periodic trends are patterns on the periodic table that
illustrate elements' characteristics.
Significant trends are atomic radius, metallic
reactivity, electronegativity, electron affinity, and
ionization energy.
Atomic radius and metallic reactivity trends:
They increase when they move down a group and left
across a period.
Electronegativity, electron affinity, and ionization
energy trends:
They increase when they move up a group and right
across a period.