Review for Chemistry 1 Midterm 1 Fall 2022

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Across
  1. 3. atomic ____ is the weighted average of the masses of the isotopes
  2. 4. ____ number is the number of protons an element has
  3. 6. ____ energy is greatest in gases and smallest in solids
  4. 10. when two or more atoms combine with a chemical bond this is formed
  5. 11. the portion of the universe that a scientist identifies for study
  6. 12. fundamental building blocks of matter
  7. 14. mass ______ is the total number of protons plus neutrons
  8. 15. the simplest form of matter that has a characteristic set of properties
Down
  1. 1. ____ mechanical model came from solutions to Schrodinger's equation
  2. 2. ____ electrons are electrons in the outermost energy shell - they are the most important electrons
  3. 5. _____ energy is potential energy stored in chemical bonds
  4. 7. the dense central core of an atom where protons and neutrons live
  5. 8. _____ symbol is one or two letters representing an element
  6. 9. (plural) atoms that have the same number of protons but different numbers of neutrons
  7. 13. anything that has mass and occupies space