Question

define atomic radius and describe its trend in the periodic table​

Answer 1

Answer:

Atomic radii vary in a predictable and explicable manner across the periodic table. ... The atomic radii decrease across the Periodic Table because as the atomic number increases, the number of protons increases across the period, but the extra electrons are only added to the same quantum shell.

Answer 2

Answer:

ATOMIC RADIUS = The distance between the nucleus and the outer most shell of any isolated atom is called atomic radius.

Atomic radius increases one unit if we move from left to right in a period because a new electrone is added in each group.