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pat666

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## Homework Statement

The density of copper is 8930 kg m-3, its mass number is 63.55 and its atomic number is 29.

a) Calculate the mass of a copper atom in kg.

b) How may electrons and protons does a copper atom have?

c) Estimate the diameter of a copper atom from this data.

## Homework Equations

## The Attempt at a Solution

never did chem so I am not sure about this stuff,

is mass number the same as atomic mass? I think I might need Avogadro s number for this? formula?

Have'nt tried b,c yet.

thanks.