How many protons (p) and neutrons (n) are in an atom of Sr?
A. 38 p, 52 n
B. 38 p, 90 n
C. 52 p, 38 n
D. 90 p, 38 n
Answer:A
How many protons (p) and neutrons (n) are in an atom of Sr?
A. 38 p, 52 n B. 38 p, 90 n C. 52 p, 38 n D. 90 p, 38 n