Nothing. You're probably thinking of CH3COOH (also referred to as CH3CO2H or C2H4O2), which is acetic acid.
ethanal font:wikipedia
CH3COH > CH3OH > CH3COCH3 > CH3COOCH3
CH3CH2CHO (propanal) and CH3COCH3 (propanone) are functional isomers as they differ in the functional group.
The Lewis structure of CH3COH can be represented as CH3-C=O-H, where the carbon atom in the center is double bonded to the oxygen atom. The carbon atom is bonded to three hydrogen atoms and one methyl group.
The pair of formulas that represents the same compound is H2O and H-O-H. Both formulas represent a water molecule, where one oxygen atom is connected to two hydrogen atoms.
ethanal font:wikipedia
CH3COH > CH3OH > CH3COCH3 > CH3COOCH3
CH3CH2CHO (propanal) and CH3COCH3 (propanone) are functional isomers as they differ in the functional group.
The Lewis structure of CH3COH can be represented as CH3-C=O-H, where the carbon atom in the center is double bonded to the oxygen atom. The carbon atom is bonded to three hydrogen atoms and one methyl group.
The pair of formulas that represents the same compound is H2O and H-O-H. Both formulas represent a water molecule, where one oxygen atom is connected to two hydrogen atoms.
It is an element.
Metal is not an element. It is a term used to classify an element, but it is not an element.
It is an element. Elements are composed of atoms, and atoms of elements combine chemically to form compounds.
element. Sulfur dioxide (SO2) is a compound
If you meant "element" as in a chemical element, there is no element with the symbol "ef" in the periodic table.
There is no such thing as a good element or a bad element.
Neon is an element.