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Science Test

Matter Anything that has mass and takes up space; anything you can see, touch, taste, and smell
Democritus Greek philosopher who thought the universe was made of empty space and tiny bits of stuff
Lavoisier French chemist who showed how matter changes.
Law of conservation of matter States that matter is not created or destroyed — it only changed form
Dalton Believed that matter was made of atoms that were too small to see
JJ Thompson Used a cathode ray tube (sealed on both ends with metal plates at each end, anode; positive, cathode; negative)
Electrons Negatively charged particles
Ernest Rutherford Used gold foil and bombarded it with alpha particles
Nucleus Positively charged central part of the atom
Protons Positive charged particles.
Neutrons Uncharged particles
Niels Bohr Found that electrons are arranged in energy levels
Electron cloud It’s a spherical cloud of varying density
6 quarks Up, down, strange, charmed, top, and bottom (UDSCTB)
Dmitri Medeleev Made the Periodic Table
Atomic Number The number of protons found in the Nucleus of an atom, or the number of electrons surrounding the nucleus of an atom.
Element A substance composed of a single kind of atom (cannot be broken down into another substance by chemical or physical means.)
Compound A substance in which two or more different elements are CHEMICALLY bonded together.
Mixture Two or more substances that are mixed together but are NOT chemically bonded.
Created by: pandily31
 

 



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