GROUP VIB
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THE CHROMIUM SUBGROUP
GROUP VI-B
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forms compounds with
oxidation states of 2+, 3+ and 6+
oxidation states of 2+, 3+ and 6+
Chromium
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form compounds in which they exhibit oxidation
states of 2+ through 6+.
states of 2+ through 6+.
Molybdenum and tungsten
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For chromium the
most stable oxidation state is
most stable oxidation state is
3+.
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form oxides of which those of higher molecular weight are acidic.
group VI-B
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Cr+2
green
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Cr+3
blue
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CrO4-2
yellow
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Cr2O7-2
orange
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Source of chromium
Chrome iron ore
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Trace element
Glucose tolerance factor
Increases insulin sensitivity
Glucose tolerance factor
Increases insulin sensitivity
Chromium
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Found in brown sugar & butter
Salts are destructive to tissues
Salts are destructive to tissues
Chromium
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Chromium deficiency
mimics Diabetes Mellitus
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Powerful oxidizing agent
K2Cr2O7
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Essential trace element
Cofactor of enzyme that are flavin dependent
Cofactor of enzyme that are flavin dependent
Molybdenum
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Use in nitrogen fixation involve in bacterial
fixing of atmospheric nitrogen
MoO+FeSO4 (Mol-Iron®)
fixing of atmospheric nitrogen
MoO+FeSO4 (Mol-Iron®)
Molybdenum
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Radioactive element
Discovered by Becquerel
Manufacture of atomic bombs
Discovered by Becquerel
Manufacture of atomic bombs
Uranium
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Use in making special steel alloys,
Filaments of electric lamps
as the anti-cathode in X-ray tubes.
Filaments of electric lamps
as the anti-cathode in X-ray tubes.
Tungsten
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