The following diagram is a representation of 20 atoms of
a fictitious element, which we will call nevadium (Nv).
The red spheres are 293Nv, and the blue spheres are 295Nv.
(b) If the mass of 293Nv is 293.15 u and
that of 295Nv is 295.15 u, what is the atomic weight of Nv?
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