CSEC Chemistry · May/June 2010 · Paper 1 · Question Q3
X and Y are isotopes. Which of the following would be true for the atoms X and Y? I. They have the same number of electrons. II. They have the same number of protons. III. They have different numbers of neutrons.
- (A)III only
- (B)I and II only
- (C)II and III only
- (D)I, II and III
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