This video explains basic information of finding number of sigma and pi bonds in Carbon molecule (C2)
Sigma bond
1. A type of covalent bond which is formed by axial overlap of s-s , s-p, and p-p orbitals.
2. Due to axial axial overlapping, it is strong
3. There is a free rotation around the sigma bond
4.The electron cloud is symmetrical.
pi bond
1. A type of covalent bond which is formed by sideway or lateral overlap of p-p orbitals.
2. Due to sideway overlapping, it is weak.
3. There is no free rotation around pi bond
4.The electron cloud is unsymmetrical & consists of two charged clouds one above and below the plane due to sideway overlap
In C2 molecule.
Bond order =Nb-Na/2 = 8-4/2 =2
Stability =Stable
Since Bond order is 2, double bond exists between Carbon molecule.In C2 molecule, double bond consists of two pi bonds.because of the four electrons in two pi molecular orbitals.
Magnetic property - Since there is no unpaired electrons, it is diamagnetic.