How does temperature affect the solubility of oxygen in water?

Water temperature is one of the most important characteristics of an aquatic system, affecting: Dissolved oxygen levels. The solubility of oxygen decreases as water temperature increases.

hope this helps :3

Abay where the river empties into the sea

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass