A formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms.
I guess if you mix them together, the chalk would get less harder.
The common way electrons are found in shells or orbitals that surround the nucleus of an atom.I hope it helped
When pressure is added to a gas the molecules bounce around really fast and push against the walls of its container. That's why when you squeeze an empty water bottle you can crush it all the way. The smaller the container the more the molecules hit the walls faster and that's what creates pressure. While moving around the molecules get hot as they speed up. Heat = Pressure.
