Which of the following representations is correct for an atom X with 28 electrons and 30 neutrons?
A
\(^{30}_{28} X\)
B
\(^{28}_{30} X\)
C
\(^{58}_{30} X\)
D
\(^{58}_{28} X\)
Verified Correct Answer: D.
Physical Principles & Numerical Solution
\(X^{A = p + n = 28 + 30 = 58}_{Z = P = E = 28}\)
Source: Myschool Past Questions Archive (Record #34412)