compare between sodium atom and sodium ion
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Sodium atom Sodium ion
Sodium atom is electrically neutral.
Sodium-ion is positively charged.
In sodium atom, there are 11 proton and 11 electrons,
i.e. an equal number of protons and electrons.
In sodium ion, there are 11 protons but 10 electrons.
The sodium atom has only one electron in its valence shell.
Sodium-ion has 8 electrons in its valence shell.
Size of a sodium atom is larger than a sodium ion.
Size of a sodium ion is smaller than a sodium atom.
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