There are two unpaired electron in ground state of carbon atom whereas at higher energy level , four unpaqired electrons are present as carbon is tetravalent. These single electrons cannot pair up due to electronic repulsion and violation of Hund's rule.
The unpaired electron is the single electron which present in atomic orbitals of carbon i.e. 1s, 2s and 2p orbital.
Carbon having unpaired electrons are exist as radicals and carbanions can be stabilized by resonance. resonance stablised system is showing the shifting of electrons, simultaneous breaking and forming of new bonds to provide a stable system.
Learn more about the resonance here: https://brainly.com/question/11331041
#SPJ4
