A metallic solid with atoms in a face-centered cubic unit cell with an edge length of 557 pm has a density of?

A metallic solid with atoms in a face-centered cubic unit cell with an edge length of 557 pm has a density of 1.54 g/cm3. Calculate the atomic radius and the atomic mass of the metal. atomic radius___cm atomic mass___g/mol Please I need help guys~ I only have one more trial left....I got 4wrongs... show more A metallic solid with atoms in a face-centered cubic unit cell with an edge length of 557 pm has a density of 1.54 g/cm3. Calculate the atomic radius and the atomic mass of the metal.
atomic radius___cm
atomic mass___g/mol

Please I need help guys~ I only have one more trial left....I got 4wrongs already....can't tell what I'm doing wrong~ D=
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