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)
Correct Answer: Option D
Explanation
(X^{A = p + n = 28 + 30 = 58}_{Z = P = E = 28})