Protons, neutrons, electrons for isotopes: zirconium-90 and antimony-123?

Data:

z = p = e

Using:

Zirconium  

Atomic Mass (A) = 90
Atomic number (z) = 40
Neutron number (n) = ?

A = z + n
90 = 40 + n
n = 90 - 40
n = 50

Soon (Zirconium)
z = p = e
40 = 40 = 40

Protons (p) = 40
neutrons (n) = 50
Electrons (e) = 40

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Using:

Antimony  

Atomic Mass (A) = 123
Atomic number (z) = 51
Neutron number (n) = ?

A = z + n
123 = 51 + n
n = 123 - 51
n = 72

Soon (Antimony)
z = p = e
51 = 51 = 51

Protons (p) = 51
neutrons (n) = 72
Electrons (e) = 51

Okay well gravitational energy is matter forced by gravity making energy though the kinetic energy then the electric energy produces electricity from the kinetic energy and the kinetic energy gets its energy from the gravitational energy. was that the answer you wanted or something else?