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17 November, 05:40

Given that oxygen has an atomic number of 8.

How many protons and neutrons are in the isotope 18^O, or oxygen - 18?

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Answers (2)
  1. 17 November, 06:46
    0
    Answer: 8 protons and 10 neutrons

    Explanation:

    Atomic number is defined as the number of protons or number of electrons that are present in an atom.

    Atomic number = Number of electrons = Number of protons

    atomic number = 8 = Number of protons

    Mass number is defined as the sum of number of protons and neutrons that are present in an atom.

    Mass number = Number of protons + Number of neutrons

    Mass number = 18 = Number of protons + Number of neutrons

    Thus Number of neutrons = 18 - Number of protons = 18 - 8 = 10

    Thus there are 8 protons and 10 neutrons in Oxygen - 18.
  2. 17 November, 07:59
    0
    Oxygen (O), for example, has three naturally occurring isotopes, which can be written as 8/16O, 8/17 O, and 8/18O.
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