Elemental Cations
?
Fe2+
Fe3+
iron(II) ion
iron(III) ion
Indicate the charge with
a Roman numeral...
...unless the element
forms only one cation.
K+
Al3+
Ba2+
potassium ion
aluminum ion
barium(II) ion
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Notes:
cations with charges of more than +4 are rare.
most transition metals have +2/+3 ions, w/ a few +1’s.