Mod 16: Properties of Atoms and Periodic Table Vocabulary

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Across
  1. 7. name of vertical columns in the periodic table
  2. 8. unit of measurement used to quantify an atom's mass (3 words)
  3. 12. number of protons in an atom's nucleus is identified by this (2 words)
  4. 14. area around the nucleus of an atom where electrons are likely to be found (2 words)
  5. 18. arranged elements by increasing atomic number
  6. 19. atomic particles smaller than protons and neutrons
  7. 20. elements that are gases or brittle solids at room temperature and are not good conductors of heat and electricity
Down
  1. 1. table that arranges elements by increasing atomic number (2 words)
  2. 2. particle with an electric charge of 1+
  3. 3. particles with an electric charge of 1-
  4. 4. smallest particle of an element that retains the element's properties
  5. 5. elements that exhibit properties of metals and nonmetals
  6. 6. atoms of the same element that have different numbers of neutrons
  7. 9. arranged periodic table by increasing atomic mass
  8. 10. small, positively charged center of atom
  9. 11. name of horizontal rows of elements in periodic table
  10. 13. type of diagram that consists of the chemical symbol surrounded by dots to represent the number of electrons in the outermost energy level(2words)
  11. 15. elements that are usually solid at room temperature, shiny, and are good conductors of heat and electricity
  12. 16. electrically neutral particles in the nucleus
  13. 17. sum of the number of protons and number of neutrons (2 words)