World of chemistry

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Across
  1. 4. a process where starting substances break and form new chemical bonds to transform
  2. 7. a positively charged subatomic particle found in the nucleus
  3. 9. a molecule that has an even distribution of electrical charges
  4. 10. positively charged subatomic particle found in the nucleus
  5. 11. two or more substances that are physically combined without forming chemical bonds
  6. 12. a pure substance made of only one type of atom
Down
  1. 1. particle with no electric charge
  2. 2. Atoms that have lost one or more atoms or gained one or more atoms to carry a electric charge
  3. 3. a form of matter that has constant uniform
  4. 5. the smallest unit of matter
  5. 6. a pure substance made of two or more chemicals held together
  6. 8. sharing of electrons between atoms in a molecule