Physical Science Crossword Puzzle

Last name of the person who discovered the existence of the neutron
Branch of science dealing with matter and energy
Substance where two or more elements are chemically combined in a set ratio
Phase change from gas to liquid
A material that conducts heat or energy well
Last name of the person who successfully isolated Radium salts in her laboratory in 1902
How tightly packed matter is
This part of the atom orbits around the nucleus
Phase change from liquid to solid
An educated guess based on observations
A material that does not conduct heat or energy well
A charged atom that has lost or gained electrons
An atom containing a different number of neutrons from protons
The actual amount of matter in an object or body
Anything that has mass and takes up space
Phase change from solid to liquid
The dense center of the atom
The force exerted on the surface area of an object
The last name of the person who conducted the gold foil experiment
A well-mixed mixture containing both a solute and a solvent
Phase change from solid to gas
Phase change from liquid to gas