Isotopes Worksheet - Answer Key

 

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  1. What is an isotope?

    Atoms of the same element with different mass numbers.

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  2. How is an isotope formed?

    Isotopes are formed when the atoms of an element have differences in the number of neutrons contained in the nucleus.

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  3. How can you tell if two substances are isotopes of each other?

    They have the same number of protons (i.e. the same element) but their mass number is different.

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  4. Which of the following are sets of isotopes?

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    1. 12C, 13C, 14C

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    2. 12C, 14N, 19F

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    3. 10B, 10Be, 10Li

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    4. 56Fe, 58Fe, 59Fe

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