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Introduction to Atoms: Understanding the Smallest Particle

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  1. Introduction to Atoms

  2. What is the smallest particle into which an element can be divided and still be the same substance? • A. electron • B. neutron • C. proton • D. atom

  3. What is the smallest particle into which an element can be divided and still be the same substance? • A. electron • B. neutron • C. proton • D. atom

  4. How did the Greek Democritus describe atoms? • A. large, soft particles • B. small, hard particles that were dividable. • C. small, hard particles-like a tiny marble • D. large, hard particles

  5. How did the Greek Democritus describe atoms? • A. large, soft particles • B. small, hard particles that were dividable. • C. small, hard particles-like a tiny marble • D. large, hard particles

  6. If an isotope of uranium, uranium-235, has 92 protons, how many protons does uranium-238 have? • A. 92 • B. 95 • C. 143 • D. 146

  7. If an isotope of uranium, uranium-235, has 92 protons, how many protons does uranium-238 have? • A. 92 • B. 95 • C. 143 • D. 146

  8. Which of the following is the smallest subatomic particle and has the least mass in the atom?? • A. nucleus • B. proton • C. neutron • D. electron

  9. Which of the following is the smallest subatomic particle and has the least mass in the atom?? • A. nucleus • B. proton • C. neutron • D. electron

  10. An atom of gold with 79 protons, 79 electrons, and 118 neutrons would have a mass number of • A. 39 • B. 158 • C. 197 • D. 276

  11. An atom of gold with 79 protons, 79 electrons, and 118 neutrons would have a mass number of • A. 39 • B. 158 • C. 197 • D. 276

  12. In Thomson’s “plum pudding” model of the atom, the plums represent • A. atoms • B. protons • C. neutrons • D. electrons

  13. In Thomson’s “plum pudding” model of the atom, the plums represent • A. atoms • B. protons • C. neutrons • D. electrons

  14. What did Democritus, Dalton, Thomson, Rutherford, and Bohr all have in common? • A. They each identified new elements. • B. They each identified new isotopes of atoms. • C. They each discovered something about what we know about atoms today. • D. They each were born in Greece..

  15. What did Democritus, Dalton, Thomson, Rutherford, and Bohr all have in common? • A. They each identified new elements. • B. They each identified new isotopes of atoms. • C. They each discovered something about what we know about atoms today. • D. They each were born in Greece.

  16. The sum of protons and neutrons in an atom • A. Atomic number • B. Mass number • C. Atomic mass unit (amu) • D. Electron cloud

  17. The sum of protons and neutrons in an atom • A. Atomic number • B. Mass number • C. Atomic mass unit (amu) • D. Electron cloud

  18. The number of protons in the nucleus of an atom • A. Isotope • B. Atomic number • C. Atomic mass unit (amu) • D. Mass number

  19. The number of protons in the nucleus of an atom • A. Isotope • B. Atomic number • C. Atomic mass unit (amu) • D. Mass number

  20. Particle that cannot be cut according to Democritus. • A. atom • B. nucleus • C. isotope • D. proton

  21. Particle that cannot be cut according to Democritus. • A. atom • B. nucleus • C. isotope • D. proton

  22. Region where electrons are likely to be found • A. electron cloud • B. nucleus • C. isotope • D. proton

  23. Region where electrons are likely to be found • A. electron cloud • B. nucleus • C. isotope • D. proton

  24. Atoms that have the same number of protons but different numbers of neutrons • A. proton • B. electron • C. isotope • D. neutron

  25. Atoms that have the same number of protons but different numbers of neutrons • A. proton • B. electron • C. isotope • D. neutron

  26. Subatomic particle that has a positive charge • A. neutron • B. electron • C. isotope • D. proton

  27. Subatomic particle that has a positive charge • A. neutron • B. electron • C. isotope • D. proton

  28. Negatively charged particle discovered by J J Thomson • A. nucleus • B. electron • C. proton • D. atom

  29. Negatively charged particle discovered by Thomson • A. nucleus • B. electron • C. proton • D. atom

  30. Particle in the center of an atom that has no charge • A. neutron • B. nucleus • C. isotope • D. electron

  31. Particle in the center of an atom that has no charge • A. neutron • B. nucleus • C. isotope • D. electron

  32. A unit of mass that describes the mass of an atom or molecule. • A. atomic number • B. atomic mass unit (amu) • C. mass number • D. electron cloud

  33. A unit of mass that describes the mass of an atom or molecule. • A. atomic number • B. atomic mass unit(amu) • C. mass number • D. electron cloud

  34. Central region of the atom • A. isotope • B. proton • C.nucleus • D. electron

  35. Central region of the atom • A. isotope • B. proton • C.nucleus • D. electron

  36. Who proposed this model of an atom? • A. Bohr • B. Thomson • C.Rutherford • D. Democritus

  37. Who proposed this model of an atom? • A. Bohr • B. Thomson • C.Rutherford • D. Democritus

  38. Introduction to Atoms Nice to have met you…

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