# Problem: 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

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We’re being asked to determine the number of protons and neutrons in strontium-90

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###### Problem Details

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