What Profession Did Thomson Give To The Particles That Would Late Be Called Atom
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1. What did Democritus call the indivisible matter he postulated?
-Atomos
2. Why and for how long were Democritus's ideas buried?
-Democritus’s ideas were buried for over 2400 years. They were buried this long because Aristotle and Plato told everyone they were incorrect.
3. What profession did John Dalton hold when he came up with his atomic theory?
A teacher
4. Identify the five main points of John Dalton's atomic theory?
-Elements are made of tiny particles called atoms.
-All atoms in a given element are identical.
-Atoms of different elements are different.
-Atoms can’t be destroyed, created, or divided.
5. Why was J.J. Thomson so confused by the fact the cathode rays bent towards the positive pole?
-Because he knew it had no charge.
6. What name did Thomson give to the particles that would late be called "electrons?"
-Corpuscles
7. Explain J.J. Thomson's "plum-pudding" model.
-He thought the raisins were like electrons, lots of them spread out.
8. Explain Rutherford's "gold-foil" experiment and comment on how he arrived at his conclusions. -He shot light particles at a gold foil screen and it went through it. Sometimes one would bounce back so he then took this to be the nucleus.
9. Explain how Millikan determined the charge on the electron.
He used oil particles dropping through an opening and sent a shock, which they then got suspended in the water, which then he knew the electron had a charge. English Comp.
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