Its all because of the electron dencity around the nucleus.when a carbon atom makes 3 bonds with another carbon atom there exists 1 sigma bond and 2 pi bonds,but it needs very high energy to have 1 sigma bond and 3 pi bonds that's why a carbon atom cannot make 4 bonds with another carbon atom.
Carbon atoms linked together via sp3 bonds are a common allotrope of elemental carbon, also known as diamond. This is a carbon atom linked with four other carbon atomons in a tetrahedral geometry.
Carbon bonds with other atoms through covalent bonds, which is when an atom shares electrons with another atom. Carbon has four electrons available for covalent bonding.
A carbon atom can form 4 bonds at maximum.
The carbon atom can form up to four covalent bonds.
4 covalent bonds result in a stable carbon atom.
The molecule that shows an appropriate number of bonds around each carbon atom should show the carbon atom with 4 total bonds.
If a carbon atom forms four covalent bonds with four different atoms or groups, the particular carbon is said to be chiral. And the molecule shows stereoisomerism around that atom.
A carbon atom can form 4 single covalent bonds
Carbon makes 4 bonds.