Chemistry

12345678
Across
  1. 2. ability to burn or ignite
  2. 4. cloud outer layers of atoms made up of energy levels
  3. 7. amount of matter in a substance
  4. 8. has a positive charge
Down
  1. 1. ability to react with other elements
  2. 3. ability to be hammered into thin sheets
  3. 5. center of the atom
  4. 6. makes up all mater
  5. 8. level how acidic or alkaline basic a substance is compared to neutral