Science Vocabulary Words! Created By: Mason Browne

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Across
  1. 4. cloud the system of electrons surrounding the nucleus of an atom
  2. 5. amount of matter in a substance
  3. 7. positive charge
  4. 9. developed the Bohr model
  5. 10. a definite volume but no definite shape
  6. 11. a tabular array of the chemical elements organized by atomic number, from the element with the lowest atomic number to the highest atomic number
  7. 13. the number of a chemical element in the periodic system
  8. 16. mass of a unit volume of a material substance
  9. 17. mass of an atom
  10. 18. made the periodic table
Down
  1. 1. the smallest particle of a substance that has all of the physical and chemical properties of that substance
  2. 2. negative charge
  3. 3. composed of or resulting from union of separate elements
  4. 6. a definite shape, as well as mass and volume
  5. 8. neutral charge
  6. 12. a pure substance consisting only of atoms that all have the same numbers of protons in their nuclei
  7. 14. the central part of an atom that comprises nearly all of the atomic mass and that consists of protons and neutrons
  8. 15. no definite volume and no definite shape
  9. 17. made up of protons, neutrons and electrons