Intro to Atoms

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Across
  1. 4. is the smallest particle of an element that retains the properties of that element; the building blocks of matter
  2. 6. Anything that has mass and takes up space is
  3. 9. What element is found in every living thing
  4. 10. A negatively charged particle in an atom is the
  5. 12. Anything that is not matter is a form of
  6. 13. A positively charged particle in an atom is the
  7. 14. the core of the atom, made up of protons & neutrons.
  8. 15. the quantity of matter contained in an atom of an element
Down
  1. 1. number of a chemical element is the charge number of an atomic nucleus
  2. 2. Atoms are mostly made up of
  3. 3. is the smallest unit of a chemical compound that retains the
  4. 5. protons, neutrons, and electrons.
  5. 7. An elementary particle that makes up protons & neutrons is
  6. 8. matter that is composed of only one kind of atom
  7. 11. A particle with no charge that is found in an atom is the