Name the elements which have the smallest and the largest atom?
When predicting how atomic radius will change as you move along the periodic table, remember these two trends.
1. As you move down the table in a given group, the atomic radius of the atoms will increase.
2. As you move left to right in a given period, the atomic radius will decrease.
Helium has the smallest atomic radius. This is due to trends in the periodic table, and the effective nuclear charge that holds the valence electrons close to the nucleus. Atomic radius decreases as you move across a period from left to right and decreases as you move up a group from bottom to top. Since He is at the upper right-hand corner of the table, it must have the smallest atomic radius.
atomic size INCREASES down a Group, a vertical column of the Periodic Table.
Therefore, It is found that Helium is the smallest element and Francium is the largest element.
When predicting how atomic radius will change as you move along the periodic table, remember these two trends.
1. As you move down the table in a given group, the atomic radius of the atoms will increase.
2. As you move left to right in a given period, the atomic radius will decrease.
Helium has the smallest atomic radius. This is due to trends in the periodic table, and the effective nuclear charge that holds the valence electrons close to the nucleus. Atomic radius decreases as you move across a period from left to right and decreases as you move up a group from bottom to top. Since He is at the upper right-hand corner of the table, it must have the smallest atomic radius.
atomic size INCREASES down a Group, a vertical column of the Periodic Table.
Therefore, It is found that Helium is the smallest element and Francium is the largest element.
