So let's begin with the non polar covalent bond. So let's suppose we have two atoms. So two atoms that are exactly the same mean they have the same amount of protons in the nucleus and the same amount of electrons. So here we have our picture where we have our nucleus one with some amount of electrons and nucleus two with the same amount with the same number of electrons. And each nucleus or each atom donates an electron. So one coming from this atom and the second coming from this atom.