amino acids
The part of a fatty acid molecule being described is the carboxyl group. It consists of one carbon atom bonded to the OH group by a single bond and to an oxygen atom by a double bond. This carboxyl group is important for the chemical properties of fatty acids.
Diatomic oxygen is a diatomic molecule joined by a double covalent bond.
An atom is the smallest complete particle of an element. A molecule consists of two or more atoms joined together.
In an alkene with two carbon atoms being joined, there would be one double bond between the carbon atoms, and 4 single bonds for the 4 hydrogens, and it would be drawn as follows: H2-C=C-H2. This is ethene, and so it has a total of 5 bonds (unless you count the double bond as a sigma and a pi) then it has 6 bonds.
double sugars. glucose is a monomer.
Organic
3 oxygen atoms, so one and a half oxygen molecules. 3 Oxygen atoms joined by a single and a double bond in a bent shape, it is one molecule. A normal molecule of Oxygen has two atoms joined by a double bond.
A compound containing a carbon-carbon double bond is called an alkene. Alkenes are a type of unsaturated hydrocarbon where two carbon atoms are joined by a double bond. Examples include ethene (ethylene) and propene (propylene).
Carbon has 4 available bonds. Oxygen has 2. All bonds must be used up or the compound will not be stable. Each oxygen is joined to the carbon by a double covalent bond. CO2 has 2 double-covalent bonds (4 covalent bonds in total)
No carbon-carbon (C=C) double bonds. All carbons are joined to four other atoms: either carbon or hydrogen.
This category includes all of the following, and there may be other: O2, CO, and NO.
A disaccharide (e.g. sucrose; or ordinary, off-the-shelf table sugar) is a carbohydrate molecule that consists of two monosaccharides (single carbohydrate monomers) joined together by a glycosidic bond.