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2 November, 14:26

7 An atom that has 13 protons and 15 neutrons is an isotope of the element

(1) nickel (3) aluminum

(2) silicon (4) phosphorus

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  1. 2 November, 14:29
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    an atoms identity is always defined by the number of protons and it is seen in the periodic table so if an atom has 13 protons it will be aluminum
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