An ion of iron has an 26 protons, 30 neutrons, and 23 electrons. What are its atomic number, atomic mass, and net charge?
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The atomic number of an atom is the number of protons. The atomic mass is the sum of the protons and neutrons. The net charge is the difference between the number of protons, which have positive charges, and electrons, which have negative charges. 

All atoms and ions of iron have...


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The atomic number of an atom is the number of protons. The atomic mass is the sum of the protons and neutrons. The net charge is the difference between the number of protons, which have positive charges, and electrons, which have negative charges. 

All atoms and ions of iron have 26 protons. Iron"s atomic number is 26. Atoms don"t gain or lose protons.

The atomic mass of this ion is 56, which is the sum of its protons and neutrons. This represents the mass of one ion in atomic mass units and the mass of one mole of ions in grams. Atoms of the same element can have diferent numbers of neutrons. These different forms are called isotopes.

The net charge on this ion is +3, because it has 26 protons and 23 electrons: +26 + (-23) = +3

Atoms can gain or lose electrons to form ions. Iron forms two different ions, Fe2+ by losing two electrons and Fe3+ by losing three electrons.

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