AP Chemistryeasymcq1 pt
Which pair of atoms are isotopes of the same element?
A.X with 8 p and 9 n; X with 8 p and 10 n
B.X with 8 p and 8 n; X with 9 p and 8 n
C.X with 8 p and 9 e; X with 8 p and 10 e
D.X with 8 p and 9 n; X with 9 p and 9 n
Explanation
Core Concept
Isotopes share proton number (element identity) and differ in neutron number. Both have 8 protons — oxygen — with 9 and 10 neutrons (O-17 and O-18).
Correct Answer
AX with 8 p and 9 n; X with 8 p and 10 n
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