Biology Scaffolding- The Periodic Table, Elements, and Atoms

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Across
  1. 5. Protons and neutrons held together by the "strong force"
  2. 7. Define the atom
  3. 8. Atom that loses electrons (positively charged ion)
  4. 11. Elements needed by life in large amounts
  5. 13. Different numbers of ______ create ions
  6. 16. Charge of atom with equal number of protons and electrons
  7. 17. Atomic mass unit
  8. 18. A substance composed of only one type of atom
  9. 19. Charge of atom with "appropriate" number of neutrons in nucleus
  10. 20. Different numbers of ______ create isotopes
Down
  1. 1. Macronutrients in the human body
  2. 2. Atoms that have lost or gained electrons
  3. 3. Smallest particles of an element that can exist and still have the properties of that element
  4. 4. Electrons surround nucleus
  5. 6. Atom that gains electrons (negatively charged ion)
  6. 9. Basic unit of matter
  7. 10. Anything that has mass and takes up space
  8. 12. Atoms of the same element containing different numbers of neutrons in the nucleus
  9. 14. Elements found inside organisms in very minute qualities
  10. 15. The periodic table of...