Mikey Crossword Puzzel

12345678910111213141516171819
Across
  1. 4. occurs when an atom has more protons than electrons
  2. 5. STATE an atomic nucleus, atom, or molecule is its lowest energy state.
  3. 8. a negatively charged ion
  4. 11. A small particle with a negative charge that is found in all
  5. 12. any atom or group of atoms with one or more charge
  6. 14. a chemical substance that cannot be broken down into other substances
  7. 16. ELECTRON a negatively charged particle. Think 8
  8. 19. forms of a chemical element with specific properties.
Down
  1. 1. RULE An atom is most stable when it has 8 valence electrons
  2. 2. NUMBER the total number of protons and neutrons in an atom
  3. 3. LEVEL fixed distances from the nucleus of an atom where electrons may be found.
  4. 4. Number above an element on the periodic table
  5. 6. positively charged center of the atom consisting of protons and neutrons
  6. 7. NUMBER the number of a chemical element in the periodic system
  7. 9. neutral subatomic particle that is also with a proton
  8. 10. a particle consisting of a nucleus of protons and neutrons
  9. 13. If an atom has a greater number of electrons than protons
  10. 15. CLOUD the area around an atom's nucleus where electrons are most likely to be found.
  11. 17. measures of amount of matter in an object.
  12. 18. Not positive nor negative