Ethane has nonpolar covalent bonds. These bonds are formed between the carbon and hydrogen atoms in ethane, where the electrons are shared evenly between the atoms.
Bonds between two (adjacent) C atoms.
Carbon bonds are typically referred to as covalent bonds, in which carbon atoms share electrons with other atoms, like hydrogen, oxygen, etc. Carbon can also form double bonds and triple bonds with other atoms, depending on the number of electrons shared.
Saturated fatty acids have no double covalent bonds between carbon atoms. The carbon in the chain is saturated with all the hydrogens it can hold. Saturated fatty acids account for the solid nature at room temperature of fats such as lard and butter. Unsaturated fatty acids have double bonds between carbon atoms wherever the number of hydrogens is less than two per carbon atom. Unsaturated fatty acids account for the liquid nature of vegetable oils at room temperature.
A carbon can form a maximum of four bonds.
Ethane has nonpolar covalent bonds. These bonds are formed between the carbon and hydrogen atoms in ethane, where the electrons are shared evenly between the atoms.
Saturated means that a chemical compound has as many Hydrogens on each Carbon that "it can handle". Unsaturated means that there are places containing double bonds, triple bonds, etc., between the carbons resulting in the compound having less Hydrogens as it could have maximally. Usually all fatty acids have 1 or 2 degrees of unsaturation in their long carbon tails, usually in the form of double bonds.
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.
A fat molecule is made of a chain of carbon atoms making a "backbone" and a bunch of hydrogens along the outside. In a saturated fat, the carbon backbone has the maximum number of hydrogens it can accept. In an unsaturated fat, the carbon backbone has made one or more double bonds within the backbone and so have less than the maximum number of hydrogens around the outside.
The element that bonds with 4 chlorine atoms is carbon. Carbon tetrachloride is a compound where carbon forms bonds with 4 chlorine atoms.
CH2Cl2 Four sigma bonds as the central carbon is bonded covalently to two hydrogens and two chlorine's.
Carbon atoms form covalent bonds with other carbon atoms, and with other nonmetals, such as carbon and oxygen, or carbon and hydrogen.
Carbon atoms tend to form covalent bonds with other carbon atoms and with atoms such as hydrogen, oxygen, nitrogen, and halogens. Carbon can also form double and triple bonds with other carbon atoms or heteroatoms, giving rise to a wide variety of organic compounds.
A double carbon bond is a covalent bond. Also carbon atoms can form double bonds. Carbon shares electrons with other atoms.
For n-3-hexene, the carbons are written in a straight line with single bonds between each and a double bond between the third and fourth carbons. Hydrogens are then written around each carbon sufficient to give each carbon four bonds.
Bonds between two (adjacent) C atoms.
"Saturated" in the context of alkanes means that all carbon atoms in the molecule are bonded to the maximum number of hydrogen atoms possible, with no double or triple bonds between any of the carbon atoms. This results in a straight or branched carbon chain with single bonds only.