Chemistry

123456789101112
Across
  1. 1. Number of protons and number of electrons in an atom of an element
  2. 3. Number of protons added with the number of neutrons
  3. 5. An abbreviation for the element
  4. 9. The basic building block of matter (makes up everything)
  5. 10. 2 or more substances physically combined; easily separated
  6. 11. Part of an atom that has negative charge
  7. 12. Part of an atom that has a positive charge
Down
  1. 2. Part of an atom that has no charge or neutral charge
  2. 4. Does not have uniform appearance (can easily see the different parts)
  3. 6. Pure substances made of 1 type of atom
  4. 7. Mixture that has uniform appearance (can't see the different parts)
  5. 8. 2 or more elements chemically combined