1. A) Bohr
2. D) When excited electrons return back to the ground state, a photon of light is emitted.
3. D) 10.812 amu
Hope this helps! :)
I believe the correct answer would be the first option. It is 100 mL graduated cylinder that is the best apparatus that could be used. It has the smallest graduation as compared to the other choices. It can measure up to 0.1 mL.
It either increases or decreases the melting/freezing point.
Mass, air has that. Since what fills up a balloon? A gas
Shape, it has no definite shape. This one is accurate, it has no definite shape, it takes the shape of the object it's in.
Volume, does air take up space? If it does then yep. Balloon example/
Density, yes it does, because it's tightly wounded up.
D
Solids— have tightly packed molecules, structured shape
Liquid— have no definite shape and the molecules are not tightly packed like a solid, they are a lot more loose.
Gas— No structure at all, molecules are free flowing
Sorry I couldn’t be a better help.. but I hope this gives you a bit of an idea :)
