Question

what is atomic mass, atomic number and size or radius?​

Answer 1

Answer:

Atomic size is the distance from the nucleus to the valence shell where the valence electrons are located. ...

atomic number

the number of protons that a chemical element has in its centre (nucleus)

atomic mass

the mass of an atom of a particular chemical substance

Answer 2

Answer:

Atomic mass is the mass of nucleus.

atomic number is the positive charge on atom or no. of protons or electrons.

atomic radius is the distance between the nucleus and outermost shell.

atomic size is equal to the atomic radius...

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