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 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.
the smallest element is hydrogen of which its valency is one.
ATOM
The atom is the smallest unit of an element that has all the properties of the element.
The smallest identifiable unit of an element that retains the properties of the element is an atom.
The smallest particle of an element is called an atom.