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