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1 December, 00:03

How to determine if an atom will gain or lose electrons?

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  1. 1 December, 00:08
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    non-metals gain electron and metals lose electrons,

    Iron is a metal, so when it reacts it loses an electron becomes a cation and form ionic bonds. Hydrogen is a non-metal, it gains an electron when reacting and forms covalent bonds or ionic bonds.
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