chemistry

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Across
  1. 4. makes the periodic table and has an atom,proton,neutron,and electron
  2. 7. has 2 or more atoms
  3. 9. proton and neutrons added together
  4. 10. has a negative charge
Down
  1. 1. made up of protons and neutrons
  2. 2. gives a neutral charge
  3. 3. shows how many valence electrons a atoms have
  4. 5. a board the shows all the elements
  5. 6. shows how many energy levels an element has
  6. 8. decides the element