Chemistry

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Across
  1. 3. A Diagram that shows the number of valence electrons that an element has.
  2. 5. Pb
  3. 6. When an atom loses or gains an electron, it becomes charged and forms this.
  4. 7. A negatively charged particle in an atom.
  5. 8. W
  6. 9. The number of electrons in an atom.
  7. 11. Fe
  8. 12. An particle without a charge in the center of an atom.
Down
  1. 1. Br
  2. 2. A Diagram that shows the total number of electrons and rings that an element has.
  3. 4. The negatively charged particles in the outer ring of an atom.
  4. 10. A positively charged particle in the center of an atom.