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5 July, 20:28

Of protons neutrons and electrons, which of these can never change in atom during an ordinary chemical or physical change

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  1. 5 July, 21:02
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    The number of electron or proton of an atom can change depending on the chemical bond and the other chemical it is bonded with; an atom can either gain or lose electron. However, the number of neutrons of an atom can never change, this is the primary identity or signature of an atom.

    Answer:

    neutrons
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