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4 August, 11:41

How many neutrons does an element have if its atomic number is 48 and its mass number is 153?

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  1. 4 August, 13:36
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    105. the atomic mass of an atom are the protons + neutrons. the atomic number of an atom is the number of protons. so, to find the neutrons, subtract 153 - 48 to get 105.
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