Atoms and Molecules

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Across
  1. 2. the atom is the basic unit of matter and this is its latin name
  2. 4. a particle with almost the same mass as a neutron
  3. 6. a stable particle with a negative charge
  4. 7. the total amount of nucleons
  5. 10. net positive charge eperienced by an electron in a multi-electron atom
  6. 13. the total number of protons and neutrons in a nucleus
  7. 14. a group of elements bonded together
  8. 17. each of two or more forms of the same element with equal numbers of protons
  9. 19. physical substance in general
Down
  1. 1. the strong interaction is one of the four fundamentals of nature
  2. 3. an atom or particle with a net chare due to electrons
  3. 5. mixture of two or more elements
  4. 8. smallest component in an element
  5. 9. a coherent, typically large body of matter
  6. 11. the mass of an atom
  7. 12. any of a number of subatomic particles carrying fractional electric charge
  8. 15. a part or aspect of something abstract
  9. 16. the amount of space a object occupies
  10. 18. a stable subatomic particle occuring in all atomic nuclei