Yes, hydrogen atoms with opposite electron spins can combine. This is known as spin pairing and results in a more stable state for the atom.
Hydrogen atoms with same electron spins can combine through a process called spin flipping. This involves changing the spin orientation of one of the electrons in order to create a more stable bond with the other atom.
Hydrogen atoms combine to form molecules, which are the building blocks of all matter. These molecules have unique properties and play a crucial role in chemical reactions and the functioning of biological systems.
No, hydrogen atoms with same electron spins can only combine in a specific orientation. This is due to the quantum mechanical rules governing spin pairing and spin flipping.
If hydrogen atoms with same electron spins are forced to combine in the wrong orientation, the resulting molecule will be unstable and may undergo a chemical reaction to try and reach a more stable state. Alternatively, the atoms may not combine at all and remain as separate atoms.