Question

What is meant by saying that the atomic mass of oxygenis 16?

Answer 1

$\huge \rm \red{answer}$

It is meant that one atom of oxygen is 16 times heavier than 1/12th of the mass of Carbon atom (C¹²).

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Extra Information:-

${\boxed {\sf \orange{atomic \: mass}}}$

the atomic mass of an element is a number which expresses as to how many times an atom of the element is heavier than 1/12th of the mass of carbon atom .

$\sf{atomic \: mass = \frac{mass \: of \: an \: atom \: of \: an \: element}{ \frac{1}{12} mass \: of \: a \: carbon \: atom}}$