Question

what is atom? and what is the size of atom​

Answer 1

Answer:

An atom is defined as the smallest unit that retains the properties of an element. An atom is composed of atoms and these cannot be made or destroyed.

Explanation:

Atomic radii have been measured for elements. The units for atomic radii are picometers, equal to 10−12 meters. As an example, the internuclear distance between the two hydrogen atoms in an H2 molecule is measured to be 74 pm. Therefore, the atomic radius of a hydrogen atom is 742=37 pm 74 2 = 37 pm .

obviously the explanation is from Go ogle ...

hope it helps..

Answer 2

Answer:

The smallest part into which an element can be divided is known as atom.

Atomic radius is measured in nanometres.The radius of an atom is more than 10,000 times the radius of its nucleus (1–10 fm), and less than 1/1000 of the wavelength of visible light (400–700 nm).