Periodic Table Created by: Angilee Ubiles

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  1. 4. A substance that is made of two or more elements that are bonded chemically.
  2. 5. Elements 57-71 on the periodic table.
  3. 7. Is needed for humans on earth for survival.
  4. 8. Pattern of repeating properties.
  5. 11. A negatively charged particle in an atom.
  6. 14. Helps keep your bones and your teeth strong.
  7. 15. Classified as metals, nonmetals, and metalloids.
  8. 16. number The number of protons in the nucleus of atom.
  9. 17. first artificially made element.
  10. 20. A subatomic particle that has no electric charge.
Down
  1. 1. The periodic table was invented in the year 18.
  2. 2. A positively charged particle in an atom.
  3. 3. An electron that is the highest occupied energy level of an atom.
  4. 6. A value that depends on the distribution of an elements isotopes in nature and the masses of those isotopes.
  5. 9. Group that contains elements like lithium, sodium, potassium, and rubidium.
  6. 10. Alkali metals are very reactive with.
  7. 12. symbol Another term for a chemical symbol.
  8. 13. Elements that are poor conductors of heat and electricity.
  9. 18. Elements with properties that fall between those of metals and nonmetals.
  10. 19. elements that are good conductors of electric current and heat.