A hydrogen atom has the smallest radii.
The atoms with the largest atomic radii are found in the lower right side of the periodic table. Smallest atoms are found in the higher left part of the periodic table. He has the smallest atomic radii.
they are most reactive
the element futher down a group
The group of elements with the smallest atomic radii is the noble gases, specifically those in the helium group (Group 18). These elements, such as helium and neon, have very low atomic radii due to their high effective nuclear charge and complete electron shells, which pull the electrons closer to the nucleus. As you move across a period in the periodic table from left to right, atomic radii generally decrease, with noble gases being some of the smallest.
The atomic radii is the measure of the size of the atoms in a chemical element. This is the distance from the nucleus to the boundary of the electrons' cloud.
The smallest quantity of an element is an atom.
a quark or if you mean the smallest element hydrogen
Atoms with the smallest radii in the alkaline-earth group are found at the top of the group, such as beryllium. This is because as you move down the group, additional electron shells are added, increasing the atomic radius.
ATOM
the smallest element is hydrogen of which its valency is one.
The atom is the smallest unit of an element that has all the properties of the element.
Beryllium (Be) is the group 2 element with the smallest atomic radius. This is due to its higher nuclear charge relative to its size, which results in a stronger attraction between the nucleus and the electrons, pulling them closer. As you move down the group, atomic radii increase because additional electron shells are added, outweighing the increase in nuclear charge.