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22 May, 19:54

An atom has 27 protons and 32 neutrons. Which of the following symbols is correct for this atom?

59Co

32Co

59Ge

27Ge

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  1. 22 May, 20:33
    0
    59Co

    To identify the element, look at the atomic number, which is the amount of protons. This is cobalt.

    The notation used above to write the element is mass number-chemical symbol, and so to find the mass number, simply add the number of protons to the number of neutrons. This gives you 59. Therefore, the correct symbol is 59Co
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