Matter

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Across
  1. 2. -An element is a substance that cannot be broken
  2. 4. an atom that gains or loses one or more eletroin
  3. 5. number- the sum of protons and nucleus
  4. 6. matter is made of substances called elements.
  5. 7. numbers- of protons in atoms nucleus
  6. 10. has a little mass but negative elecrtic
  7. 11. is a tiny particle that mass and a positive
Down
  1. 1. is a tiny particle with approximately the same
  2. 3. the center of an atom
  3. 4. atoms of the same element is the average of th
  4. 8. is anything that has volume and mass.
  5. 9. into simpler substances by physical or chemical.