Question

how does atom measure ?​

Answer 1

Answer:

The mass of atoms and subatomic particles is measured using atomic mass units (abbreviated amu); protons and neutrons have a mass of one amu, and the mass of an electron is negligible. ... The identity of an atom is defined by the number of protons in its nucleus; each unique type of atom is called an element.

Answer 2

Answer:

An atom of any probability measure μ on ( R, B) is a singleton { x } such that μ ( x) > 0. Given a measurable space ( X, Σ) and a measure μ on that space, a set A in Σ is called an atom if μ ( A) > 0 and for any measurable subset B of A with μ ( A) > μ ( B), one has μ ( B) = 0.

Explanation: