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Carbon Dioxide,
Carbon Monoxide,
Carbonic Acid,
Sodium/Potassium/Calcium Carbonate,
Sodium/Potassium/Calcium Bicarbonate,
Methane,
Methyl Alcohol,
Formaldehyde,
Formic acid,
Sodium/Potassium/Silver Formate,
Diazo-methane,
Carbon Tetrachloride,
Chloroform,
Iodoform,
Methyl Bromide/Chloride/Iodide,
Dichloromethane,
Methyl Cyanide,
Sodium Methoxide,
etc.

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15y ago
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13y ago

elements have molecules but hydrogen has one electron and one proton

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9y ago

Alkane

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Q: What molecule has only one element?
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