Question

Assume that you have a new "triad" of elements (a, b and
c.with similar properties. a is the smallest element and has a mass of 30 u. c is the largest element and has a mass of 90 u. the mass of b would be approximately ________ u.

Answer 1

mass B = mass(A) + mass(A)
so in this case,40u+137u=177 u

2. 2
mass (B)=88.5u