Across
- 5. Is made of substance called elements
- 6. The center of an atom
- 7. Is a tiny particle with approximately the same mass
- 8. Number- The sum of the protons and the nucleus in an atom nucleus
- 10. Has little mass,but it has negative electric charge the same.
Down
- 1. anything that has volume and mass
- 2. is a tiny particle that has mass and a positive .
- 3. Atoms of the same element is the average of the mass number
- 4. An atom that gains or loses one or more electrons from its outermost.
- 9. Numbers- Of protons in an atoms nucleus