In a 2003 post about electrons and their behavior, which as a rule goes, tended not to get to a final solution, there was a quote by a poster: "There is no chemical bond between chlorine and sodium. That is to say it is only electrostatic attraction, an ionic bond as opposed to a covalent bond. The pauli exclusion principle applies to electrons that occupy the same orbital, such as in a covalent bond." I never participated in that converstaion but I found interesting this wording. Would any of you be kind enough to discuss some questions, that arise from that. 1. What is the main and most important difference between a "chemical bond" and "electrostatic interaction" I find it troubling, that people use those terms this way, implying that there is another fundamental attraction other than electronmagnetic, when it comes to molecular ponding. In fact many chemists believe there is something different, although they can not explain it. 2. How would you explain to people about a bond electron in an atom, who should not spin around nucleus, becuase it would lose its energy, having an orbital and spin? 3. As concpetually as possible, how would you describe, what exactly causes a "covalent bond"? Where is energy before the bond making, how it redistributes and where does it end up? 4. It seems, that many people take the idea of "electron pair" into a rationalising path: evreyone has its own imagination and explanation as to what it is. How would you explain "and electron pair": how do the electron interact with the nucleus and eachother, when they are "paired up"? 5. How would you describe, what is a bond? It seams to be a rather dangerous word, bcause it can lead to misconceptions. So what is a "bond" and more importantly, why isn't the attractions and repulsion in a NaCl solid called a "bond"? Kind regards.