Question

what is molecule and define atomic mass ​

Answer 1

Answer:

molecule -

group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

atomic mass -

mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.

Explanation:

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Answer 2

$\sf{Good\:Morning}$

$\sf{What\:is\:molecule?}$

$\sf{Answer:-}$Molecule, a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.

$\sf{Define\:atomic\:mass?}$

$\sf{Answer:-}$The atomic mass is the mass of an atom. Although the SI unit of mass is kilogram, the atomic mass is often expressed in the non-SI unit dalton where 1 dalton is defined as 1⁄12 of the mass of a single carbon-12 atom, at rest

$\sf{Answer\:by\:UnicornRahuL}$