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Which statement describes two different isotopes of carbon?

NY Regents Chemistry Exam August 2023 Question 3


3  Which statement describes two different isotopes of carbon?

(1)  The isotopes contain the same number of neutrons and have the same atomic number.

(2)  The isotopes contain the same number of neutrons but have a different atomic number.

(3)  The isotopes contain a different number of neutrons but have the same atomic number.

(4)  The isotopes contain a different number of neutrons and have a different atomic

number.


Solution: Isotopes are atoms of the same element (same number of protons) with a different mass number (different number of neutrons) Choice 3

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