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Chemistry: Understanding Matter and Atomic Theory

Learn about particles, counting matter, atomic theory, P.T. trends, and the basics of chemistry. Explore compounds, mixtures, elements, and more.

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Chemistry: Understanding Matter and Atomic Theory

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  1. Counting Particles Matter Atomic Theory P.T. Trends Grab Bag 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400 500 500 500 500 500 600 600 600 600 600

  2. What is Chemistry? The Study of Matter

  3. What is the name for a substance that cannot be broken down by either chemical or physical means? An Element

  4. What is the name for a substance that contains 2 or more elements and cannot be broken down by physical means? Compound

  5. What is a combination of 2 or more substances that can be separated by physical means? A mixture

  6. What type of mixture is not uniformly blended? Heterogenous Mixture

  7. What is a cation? A positively charged ion

  8. What type of mixture is uniformly blended? Homogenous mixture

  9. Most of the mass of an atom is found where? The Nucleus

  10. Most of an atom is made up of what? Empty Space

  11. What is the mass of a proton in AMU’s? 1 amu

  12. What is the mass of an electron? Essentially Zero

  13. What two particles’ masses are used in determining the atomic mass number? Protons + Neutrons

  14. Which scientist’s gold foil experiment helped to show that most of an atom is empty space? Rutherford

  15. What does the atomic number of an element mean? The number of protons

  16. How do you determine the number of electrons in a neutral atom? # of electrons = atomic number

  17. What is an isotope? An element with a different number of neutrons

  18. How many protons and neutrons does 37Cl have? 17 protons and 20 neutrons

  19. How many electrons does 20Ca2+ have? 18 electrons

  20. What kind of energy does an excited electron typically emit? Light

  21. What is electron affinity? An atom’s desire to grab an extra electron

  22. What is the periodic trend for electron affinity? Increases from left to right

  23. What is the periodic trend for ionization energy Increases from left to right

  24. What are the two periodic trends for atomic radius? Decreases from left to right Increases from top to bottom

  25. Why does atomic radius increase as you move from the top to the bottom of the Periodic Table? Extra shells are added

  26. Which type of elements are found to the left of the stairs? Metals

  27. Name 3 characteristics of metals Good conductors Shiny luster Malleable Ductile Solids at room temp Tend to lose electrons

  28. What are valence electrons? Electrons in the outermost shell

  29. How many valence electrons does an atom with an electron configuration of 2-8-18-5 have? 5 valence electrons

  30. What is sublimation? A change in phase from a solid directly into a gas

  31. What are the only 2 elements that are liquids at room temperature on the periodic table? Bromine and Mercury

  32. Final Jeopardy Category: Periodic Trends

  33. Define Ionization Energy. The amount of energy required to remove the outermost electron of an atom.

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