Carbon form generally covalent bonds; ionic bonds are rare.
Single, double, and triple covalent bonds
An atom of sulfur (S) can form up to six bonds.
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In an alcohol molecule, there are usually two types of chemical bonds - covalent bonds between carbon and oxygen, and hydrogen bonds between hydrogen and oxygen atoms. Each carbon atom forms a single covalent bond with the oxygen atom, while the hydrogen atoms form single covalent bonds with the oxygen atom.
Nitrogen can form single, double, and triple covalent bonds.
Each atom of carbon can form up to four bonds, while each atom of hydrogen can form up to one bond.
The number of covalent bonds an atom can form is determined by the number of valence electrons it has. Atoms will typically form covalent bonds by sharing electrons to achieve a full outer electron shell, following the octet rule (except for hydrogen and helium, which follow the duet rule). An atom can form as many covalent bonds as needed to fill its valence shell.
A hydrogen atom can form a maximum of one covalent bond.
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One carbon atom can form a maximum of four single bonds with other atoms.
A carbon atom can form 4 single covalent bonds