Atomic radius increases down a group on the periodic table because with each additional period an energy level is added.
the atomic radius decreses from left to right in periodic table due to increase in the number of succesive element the electrons of the outermost shell are more attracted towards nucleus and the atomic radius or atomic size decreases.
Francium has the largest atomic radius in Group 1 of the Periodic Table.
Atomic radius generally decreases as you go from left to right in the same period. Atomic radius increases as you go down the same group.
Decreases. Look at the images under atomic radius, on wikipedia.
It tends to increaseThe atomic radius increases down the group
Atomic radius increases down the group. It decreases along a period.
Bromine has a SMALLER atomic radius because it has one more electron shell than Iodine. On the periodic table, atomic radius of an atom decreases across a period and increases down a group. Since Bromine and Iodine are in the same group, you know Bromine has a smaller atomic radius because it is in a lower period.
atomic radius increases down a group as the number of shells increases
The atomic radius of elements increases as you go down a group. This increase in radius as you go down a period is primarily caused by the increasing principal quantum number of the outer electron shells.
Atomic radius increases down a group due to increase in number of shells. Its value decreases along a period due to increase in nuclear charge.
atomic radius decreases from bottom to top of the periodic table.