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Entry Task: Oct 8 th Monday

Entry Task: Oct 8 th Monday. Question: What are isotopes? You have 5 minutes!. Agenda:. Sign off and Discuss Isotope worksheet Self Check on Ch. 4 HW: Ch. 2-4 Review ws. Isotope worksheet. Define isotope.

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Entry Task: Oct 8 th Monday

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  1. Entry Task: Oct 8th Monday Question: What are isotopes? You have 5 minutes!

  2. Agenda: • Sign off and Discuss Isotope worksheet • Self Check on Ch. 4 • HW: Ch. 2-4 Review ws

  3. Isotope worksheet Define isotope Isotopes are elements with the same number of protons and electrons but the number of neutrons differ from the average amount. OR Its an atom that has more or less the average number of neutrons in the nucleus of an atom The mass on the periodic table are the atomic masses, what if I have an atom that does not match the periodic table for that particular element- what does this mean? Its an isotope

  4. Oxygen 16 8 8 7 Nitrogen 7 7 Calcium 20 41 20 Sodium 11 12 11 Iron 30 26 26

  5. 4. How can hydrogen-1, hydrogen-2 and hydrogen-3 all be the same element? They all have 1 proton and 1 electron but the number of neutrons are different.

  6. 5. List two ways that a proton differs from an electron. Protons are positive and in the nucleus Electrons are negative and orbits the nucleus

  7. 6. List two ways that a neutron and proton differ from each other and two ways they are similar. Protons are positive charge and have the same amount of electrons. Neutrons have no charge and the amount can change – isotopes Protons and neutrons are similar in mass and both are in the nucleus.

  8. 7. How many neutrons and protons are in each of the following isotopes? a) Carbon – 15 b) Nickel-63 c) Oxygen-18 d) Iron-54 p = 6 and n = 9 p = 28 and n = 35 p = 26 and n = 28 p = 8 and n = 10

  9. F B H E A D G I J C

  10. Democritus B. Dalton C. Chadwick • D. Thompson F. Rutherford ___11. Positive protons ___12. Used a cathode ray and magnet which affected particles. ___13. Negative electrons ___14. Theorized that all matter is composed of “atoms”. ___15. Neutrons ___16. Something other than the proton has mass ___17. Atomic Theory ___18. Particles were shot at gold foil & some bounced back. • ___19. Coined the term “Atoms” ___20. Combined research on atom to produce a theory. F D D A C C B F A B

  11. 26 24 24 24 50 242 94 94 94 148 82 211 82 82 129 20 43 20 20 23

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