I'm learning quantum mechanics in high school this year, and I have several doubts. I've done my research on various websites but my understanding is still fuzzy. I understand that when I punch a wall or sit on a chair I don"t go through it due to quantum degeneracy pressure. I've studied the Pauli exclusion principle, but here"s my first question:
What exactly is quantum degeneracy pressure? I've read answers that say "Atomic orbitals resist squishing", and the like, but I don"t understand why.
If orbitals resist squishing, why do covalent bonds form?
From the Wikipedia picture of a H2 bond it seems like the s orbitals of the individual atoms were squished from a circle(2-D) to an ellipse. How do we know when this squishing results in a lower energy state and when it doesn't? If the wall was made of atoms that didn't have an octet and my hand too would my hand bond with the door when I punched it?