Across
- 3. What holds the participating atoms together once the chemical reaction has needed.
- 4. 600 billion trillion
- 7. that does not apply to both neutrons and proteins in nuclei rule.
- 8. What is a pure substance composed of atoms of only one kind.
- 9. Which is the simplest atom with an atomic number of 1.
- 10. How many elements exist in nature?
- 12. The attraction between opposite electrical charges.
- 13. The sum of the atomic weights of it's component atoms of a molecule.
- 14. Protons plus neutrons.
- 16. What is the two dimensional representation that the electrons occupy.
Down
- 1. Electrons that travel around the nucleus at high speed, within a spherical area which is called?
- 2. Electrons travel in complex patterns around nucleus.
- 5. electrons that travel around the nucleus at high speed,w
- 6. Present in the body in very small amounts.
- 11. What are atoms composed of?
- 15. the central region of an atom.