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- 1. Multiple Choice
What were John Dalton three contributions to atomic history?
Created the atomic theory
Discovered that the atom is mostly empty space
Believed that atoms of a given element are identical
Hypothesized that the atom is a tiny, hard sphere
Believed that the universe was made of tiny "uncuttable" particles
- 2. Multiple Choice
Who was the first contributor to the atomic theory?
John Dalton
Ernest Rutherford
JJ Thompson
Democritus
Neils Bohr
- 3. Multiple Choice
What is the correct order of scientists in order of their work related to the atomic theory from earliest to most recent?
Neils Bohr, Ernest Rutherford, JJ Thomson, John Dalton, & Democritus
JJ Thomson, John Dalton, Neils Bohr, Ernest Rutherford, & Democritus
Democritus, John Dalton, JJ Thomson, Ernest Rutherford, and Neils Bohr
John Dalton, Neils Bohr, JJ Thomson, Democritus, & Ernest Rutherford
- 4. Multiple Choice
What were J. J. Thomson's three contributions to the atomic theory?
Discovered the electron
Discovered the nucleus -did the gold foil experiment
Used the cathode ray tube in his discovery
Created a model of the atom with electrons moving around the nucleus in fixed orbits
Created the "plum pudding" model of the atom
- 5. Multiple Choice
What are two facts about Democritus's?
Greek philosopher
Created the atomic theory
Used the cathode ray tube in his discovery
Believed that the universe was made of tiny "uncuttable" particles
Discovered that the atom is mostly empty space
- 6. Multiple Choice
What is Neils Bohr's contribution to the atomic theory?
Created the atomic theory
Created a model of the atom with electrons moving around the nucleus in a fixed orbits
Discovered that the proton had a positive charge
Believed that atoms of a given element are identical
Discovered the electron
- 7. Multiple Choice
What were Ernest Rutherford's three contributions to atomic theory?
Discovered that the atom is mostly empty space
Discovered the nucleus- did the gold foil experiment
Used the cathode ray tube in his discovery
Discovered the electron
Discovered that the proton had a positive charge
- 8. Multiple ChoiceWhich model of the atom proposed that atoms were positive spheres with negative electrons in them?Heliocentric ModelSolid Sphere ModelPlum Pudding ModelPlanetary Model
- 9. Multiple ChoiceWhich scientist saw the atom as a solid sphere?DaltonThomsonRutherfordBohr
- 10. Multiple ChoiceWho came up with this model of an atom?J.J. ThompsonErnest RutherfordNeils BohrJames Chadwick
- 11. Multiple ChoiceWho's model is this?ThomsonRutherfordDemocritusBohr
- 12. Multiple ChoiceWho came up with this model?DaltonThomsonRutherfordBohr
- 13. Multiple ChoiceProposed electrons move around the nucleus in shellsJames ChadwickJ.J. ThomsonNiels BohrErnest Rutherford
- 14. Multiple ChoiceIn Dalton's Atomic Theory, all elements consist of __________ that cannot be divided.AtomsPartsMoleculesHydrogen
- 15. Multiple ChoiceIn the Thomson Model, he discovered the existence of what particle?ElectronsProtonsNeutronsQuarks
- 16. Multiple ChoiceRutherford’s experiment determined that the nucleus of an atom is tiny, dense and ______ charged.neutrallynegativelypositively
- 17. Multiple ChoiceDemocritus believed that the smallest particles, were atomos, the Greek word forsmalluncut or indivisiblebasic
- 18. Multiple Choice
Mass is neither created nor destroyed during chemical reactions or physical changes.
Law of multiple proportions
law of definite proportions
law of scientific theory
law of conservation of mass
- 19. Multiple Choice
states that, regardless of the amount, a compound is always composed of the same elements in the same proportion by mass
law of definite proportions
law of conservation of mass
law of multiple proportions
periodic table
- 20. Multiple Choicethe smallest particle of an element that retains the chemical properties of that elementionisotopeatomelement
- 21. Multiple ChoiceTrue or False? John Dalton believed that moving electrons exist in electron clouds around the nucleus.FalseTrue
- 22. Multiple ChoiceWho proposed that the atom consists mostly of empty space?BohrDaltonRutherfordChadwick
- 23. Multiple ChoiceWho believed that electrons were scattered amongst positively charged material.JJ ThomsonErnest RutherfordJohn DaltonNiels Bohr
- Answer choicesTagsAnswer choicesTags