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- 1. Multiple Choice
This was the first model of the atom ever proposed. It was simple and described atoms as tiny spheres that could not be broken down into smaller pieces.Democritus's model of the atomThe "Plum Pudding Model" of the atomThe "Rutherford Model" of the atomThe "Quantum Mechanical Model" of the atom - 2. Multiple ChoiceErnest Rutherford discovered that atoms were mostly _________________.negatively chargedpositively chargedelectronsempty space.
- 3. Multiple ChoiceDiscovered the electron using cathode ray tubeJoseph ThomsonJohn DaltonErnest RutherfordRobert Millikan
- 4. Multiple ChoiceIdea was of an indivisible particle of matter he called "atomos"John DaltonAristotleDemocritusPlato
- 5. Multiple ChoiceWhat contribution did John Dalton make to atomic theory?He discovered that every atom was positively charged.He discovered that every element consisted of one type of atom.He discovered that atoms had nuclei.He discovered that atoms could be divided into smaller parts.
- 6. Multiple ChoiceJ.J. Thomson provided evidence that an atom...is the smallest particle of mattercontains negatively charged particleshas an overall negative chargehas an overall positive charge
- 7. Multiple ChoiceHis atomic model was depicted similar to a planetary/solar systemNiels BohrJoseph ThomsonErnest Rutherford
- 8. Multiple ChoiceRutherford concluded that the atomhas a nucleus with a positive chargehas a nucleus with a negative chargeis a small mass with negative and positive chargescontains a nucleus without a charge
- 9. Multiple ChoiceHe determined the mass of an electron and confirmed it’s charge in 1909 as a result of oil drop experiments.ThompsonChadwickMillikanDemocritus
- 10. Multiple ChoiceWhat is the Law of Conservation of mass?Mass is created in a chemical reactionMass is created in a physical changeNew chemicals formed from a chemical reaction have a larger overall mass than the original reactantsMass is never created or destroyed
- 11. Multiple ChoiceWho was the first person to come up with the Atomic Theory?John DaltonDemocritusErnest RutherfordNiels Bohr
- 12. Multiple Choice
Atoms of the same element can differ in?
chemical properties
mass number
atomic number
number of protons and electrons
- 13. Multiple Choice
The basic principles of the atomic theory that are still recognized today were first conceived by?
Avogadro
Bohr
Dalton
Rutherford
- 14. Multiple Choice
According to Dalton's atomic theory, how are compounds formed?
2 nuclei attract each other
ions are converted into the excited state
the joining of two or more atoms
through the release of alpha particles
- 15. Multiple Choice
The modern model of the atom shows that electrons are?
Orbiting the nucleus in fixed paths
Found in regions called orbitals
Combined with neutrons in the nucleus
Located in a solid sphere covering the nucleus
- 16. Multiple Choice
Why is is improbable that a student would be asked to draw an atom to scale?
The atom is too large
The nucleus is much smaller than the atom itself
Electrons do not orbit the nucleus
Electrons move too slow
- 17. Multiple ChoiceHow did Rutherford discover the proton?Cathode tube ray experimentGold Foil ExperimentPlanetary ModelPlum Pudding Model
- 18. Multiple ChoicePlace the following scientists in order, from earliest to latest: A) Ernest Rutherford; B) J.J. Thomson; C) John DaltonB, C, AC, A, BA, C, BC, B, A
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