Understanding Chemical Bonds: How Does Quantum Mechanics Explain Them?

[Intle]

So in general chemistry we learned about covelant bonds and ionic bonds and such, but recently I learned that electrons have wave-particle duality and that many things I learned in general chemistry are not necessarily completely wrong but oversimplified (such as Bohr Model). So how does quantum mechanics describe chemical bonds? Why do these bonds form by sharing electron considering that they are of opposite charge?

 

[BvU]

So in general chemistry we learned about covelant bonds and ionic bonds and such, but recently I learned that electrons have wave-particle duality and that many things I learned in general chemistry are not necessarily completely wrong but oversimplified (such as Bohr Model). So how does quantum mechanics describe chemical bonds? Why do these bonds form by sharing electron considering that they are of opposite charge?

Because it is energetically favourable.
Your question is answered in very thick books. I can't retype all that in a lifetime. Orient yourself (google if you want) and come back with concise, specific questions on items where you need a bit of guidance