🤓 Based on our data, we think this question is relevant for Professor Wald's class at MDC.
We’re being asked to determine the number of protons and neutrons in strontium-90.
How many protons (p) and neutrons (n) are in an atom of strontium-90?
A) 38 p, 90 n
B) 52 p, 38 n
C) 90 p, 38 n
D) 38 p, 52 n