Scientists use carbon dating to determine the age of fossils. 14C is a rare isotope of carbon that has a half life of 5730 years and decays

Question

Scientists use carbon dating to determine the age of fossils. 14C is a rare isotope of carbon that has a half life of 5730 years and decays into 14N. By measuring the amount of 14C remaining in a fossil, scientists can estimate when the organism died out to about 60,000 years. The atomic number of C is 6, and of N is 7. 14C and 14N have the same: Group of answer choices

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Hồng Cúc 5 years 2021-07-27T03:45:16+00:00 1 Answers 34 views 0

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  1. thuthuy
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    2021-07-27T03:47:01+00:00
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    Answer:

    The correct answer is – mass number.

    Explanation:

    The atomic number the number of electrons or protons present in a neutral atom.

    Atomic number = Number of electrons = Number of protons

    Whereas, the mass number the sum of the number of protons and the number of neutrons present in an atom.

    Mass number = Number of protons + Number of neutrons

    For C-14 and N-14:

    C-14 isotope:

    Atomic number = number of proton = number of electron = 6.

    Mass number = 14

    Number of neutrons = 14 – 6 = 8

    In N-14 isotope:

    Atomic number = number of proton = number of electron = 7

    Mass number = 14

    Number of neutrons = 14 – 7 = 7

    Thus, these two isobars have same mass number.

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