Chemistry Review

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Across
  1. 2. a testable statement or prediction
  2. 4. a set of controlled observations that test a hypothesis
  3. 5. a judgement based on the information obtained
  4. 6. a pure substance that cannot be broken down into simpler substances by physical or chemical change
  5. 8. the amount of mass per unit volume
  6. 10. a vertical column of elements in the periodic table
  7. 11. the weighted average mass of the isotopes of that element
  8. 13. the energy-releasing process by which a gas or vapor becomes a liquid
  9. 15. the smallest particle of an element that retains all the properties of that element
  10. 16. the amount of product produced when a chemical reaction is carried out
  11. 17. negatively charged particle
  12. 18. atomic mass unit 1/12 of carbon-12
  13. 21. a solution that contains more hydrogen ions than hydroxide ions
  14. 22. a heterogeneous mixture of intermediate-sized particles
  15. 23. space around the nucleus of an atom where the electron is found
  16. 24. a solution that contains more hydroxide ions than hydrogen ions
  17. 25. a horizontal row of elements in the periodic table
  18. 26. a technique used to separate the components of a mixture based upon mass
Down
  1. 1. positively charged particle
  2. 3. In a chemical equation, the number written in front to a reactant or product
  3. 7. neutrally charged particle
  4. 9. center of the atom where protons and neutrons are formed
  5. 12. the ion with a negative charge
  6. 14. the atomic number is the number of protons in an atom
  7. 15. group 1 elements except for hydrogen
  8. 16. equal volumes of gasses at the same temperature contain equal number of particles
  9. 19. Group 17
  10. 20. a form of matter that flows to conform to the shape of the container
  11. 22. a bond where electrons are shared
  12. 23. an ion that has a positive charge