Helpppoppop

What does a particular point on a line of a phase diagram represent? o a. the maximum temperature a substance can exist at without bonds breaking b. the pressure created by the kinetic energy of molecules at a particular temperature c. the melting point or boiling point of a substance at a specific pressure d. the conditions in which temperature and pressure have equal effects on a substance

Apush or pull that moves or changes and object when to objects touch

Will mark brainliest how many electrons can be held in the energy level n = 4?