Br +1e- --->Br-
Ba -2e- --->Ba2+
Al -3e- --->Al3+
O +2e- --->O2-
Fe -2e- --->Fe2+ lub Fe -3e- --->Fe3+
Cr -3e- --->Cr3+ lub Cr -6e- --->Cr6+
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Br +1e- --->Br-
Ba -2e- --->Ba2+
Al -3e- --->Al3+
O +2e- --->O2-
Fe -2e- --->Fe2+ lub Fe -3e- --->Fe3+
Cr -3e- --->Cr3+ lub Cr -6e- --->Cr6+