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Unit 8 Review
Question | Answer |
---|---|
What was Democritus' idea of an atom? | Tiny particles called atoms |
What was Aristotle's idea of an atom? | 4 Elements; Air ,Fire ,Water, Earth 4 Properties; Hot, Cold, Dry, Wet |
In you own words write down Dalton's atomic theory. | Elements = Atoms/Atoms of same element are identical |
Explain Thomson's experiment, what did he discover? | He used cathode ray tube / discovered electrons |
Explain Thomson's model of the atom. | Dense positively charges bell with electrons inside |
Explain Rutherford's experiment, what did he discover? | Gold foil Experiment / discovered the nucleus |
What is the symbol of a Proton? | p+/H |
What is the symbol of a Neutron? | n |
What is the symbol of a Electron? | e- |
What charge does a Proton have? | +1 / Positive Charge |
What charge does a Neutron have? | No charge |
What charge does a Electron Have? | -1 / Negative Charge |
How much mass does a Proton have? | 1 |
How much mass does a Neutron have? | 1 |
How much mass does a Electron have? | 1 / 1836 |
What is an isotope? | Different number of neutrons |
What is an Ion? | Gain or lose electrons |
Explain Bohr's model of the atom. | Atoms have orbitals, p+ and n found in nucleus |
What subatomic particle is the atomic number equal to (Protons,Neutrons,Electrons)? | Protons |
What two subatomic particles determine the mass of an atom (Protons,Neutrons,Electrons)? | Protons + Neutrons |
What two subatomic particles are found in the nucleus (Protons,Neutrons,Electrons)? | Protons + Neutrons |
What two subatomic particles is found outside the nucleus (Protons,Neutrons,Electrons)? | Electrons |