section 4.2 defining the atom\nin your textbook, read about the electron and the nuclear atom.\nfor each…

section 4.2 defining the atom\nin your textbook, read about the electron and the nuclear atom.\nfor each item in column a, write the letter of the matching item in column b.\ncolumn a\n1. proposed the nuclear atomic model\n2. determined the mass - to - charge ratio of an electron\n3. calculated the mass of an electron\ncolumn b\na. thomson\nb. millikan\nc. rutherford\ndraw and label a diagram of each atomic model.\n4. plum pudding model\n5. nuclear atomic model\nin your textbook, read about the discovery of protons and neutrons.\ncomplete the following table of proton, electron, and neutron characteristics.\n| particle | symbol | location | relative charge | relative mass |\n| ---- | ---- | ---- | ---- | ---- |\n| 6. proton | | | | 1/1840 |\n| 7. | n | | | |\n| 8. | | | | |

section 4.2 defining the atom\nin your textbook, read about the electron and the nuclear atom.\nfor each item in column a, write the letter of the matching item in column b.\ncolumn a\n1. proposed the nuclear atomic model\n2. determined the mass - to - charge ratio of an electron\n3. calculated the mass of an electron\ncolumn b\na. thomson\nb. millikan\nc. rutherford\ndraw and label a diagram of each atomic model.\n4. plum pudding model\n5. nuclear atomic model\nin your textbook, read about the discovery of protons and neutrons.\ncomplete the following table of proton, electron, and neutron characteristics.\n| particle | symbol | location | relative charge | relative mass |\n| ---- | ---- | ---- | ---- | ---- |\n| 6. proton | | | | 1/1840 |\n| 7. | n | | | |\n| 8. | | | | |

Answer

Brief Explanations:

  1. Rutherford proposed the nuclear - atomic model. Thomson determined the mass - to - charge ratio of an electron. Millikan calculated the mass of an electron.
  2. The plum - pudding model was proposed by Thomson and has a positive "pudding" with electrons embedded in it. The nuclear atomic model by Rutherford has a small, dense nucleus with electrons orbiting around it.
  3. Protons are in the nucleus, have a relative charge of + 1 and a relative mass of 1. Neutrons (symbol n) are in the nucleus, have a relative charge of 0 and a relative mass of 1. Electrons are outside the nucleus, have a relative charge of - 1 and a relative mass of 1/1840.

Answer:

  1. C. Rutherford
  2. A. Thomson
  3. B. Millikan
  4. Diagram: Draw a sphere representing the atom. Shade the sphere to represent the positive "pudding" and draw small dots inside to represent electrons. Label it "Plum - pudding model by Thomson".
  5. Diagram: Draw a small central circle to represent the nucleus. Draw several circles around the nucleus to represent the electron orbits. Label the central circle "Nucleus" and the outer circles "Electron orbits". Label it "Nuclear atomic model by Rutherford".
  6. Symbol: p, Location: Nucleus, Relative Charge: + 1, Relative Mass: 1
  7. Particle: Neutron, Location: Nucleus, Relative Charge: 0, Relative Mass: 1
  8. Particle: Electron, Symbol: e⁻, Location: Outside nucleus, Relative Charge: - 1