Atoms and Molecules Review

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Across
  1. 2. An atom is mostly made of empty__________.
  2. 5. A _____ model is a 2D representation of an atom.
  3. 6. The smallest building block of matter.
  4. 10. The center of the atom.
  5. 11. Neutrons have this kind of charge.
  6. 12. The number of ________ is the same is the number of protons in an atom.
  7. 14. A layer of electrons is called a ________
  8. 16. Two or more atoms bonded together make a ____________
  9. 17. Electrons have this kind of charge.
  10. 18. "Au" on the Periodic Table is the symbol for _______.
Down
  1. 1. "Pd" on the Periodic Table is the symbol for___________.
  2. 2. This element has an atomic number of 16
  3. 3. The atomic mass is neutrons + ____________.
  4. 4. Protons have this kind of charge.
  5. 7. The Atomic________ shows how many protons are in an atom.
  6. 8. All known atoms are listed on the Periodic Table of the __________
  7. 9. "Ag" on the Periodic Table is the symbol for_________.
  8. 13. Water isn't on the Periodic Table because it is a _________.
  9. 15. Carbon Dioxide contains carbon and ________