Across
- 3. Flourine's atomic number.
- 5. AMU stands for ______ mass unit.
- 7. This fundamental particle has a negative charge.
- 9. Can be described as "nuclear glue".
- 12. The ratio of protons to _____ in the stable nucleus of a light-weight atom are approximately 1:1.
- 13. A proton or neutron.
- 16. This is about the mass of a neutron or proton.
- 18. _____-14 has a half-life of 5,700 years.
- 20. If you can handle an object, it is held together by ______ force.
- 21. This atom has an atomic number of 1.
- 23. The classic concept of a(n) ______ was that it was the smallest component of matter.
- 24. Two identical electrical charges _______ each other.
- 25. The simplest (most fundamental) objects obtained by chemical means.
- 27. U238 is an isotope called __________.
- 28. These have most of the mass but hardly any of the volume of an atom.
Down
- 1. Light was previously thought to only be a wave, but is also a stream of _______.
- 2. Compared to the electrical and gravitational forces, the nuclear force is _____ range.
- 4. The action of dividing or splitting something into two or more parts.
- 6. This has the same number of protons, different number of neutrons.
- 8. These fundamental particles can be found orbiting the nucleus.
- 9. H2SO4 is a ______
- 10. Currently the objects that we hope are the smallest components of matter are _______ particles.
- 11. The first example of anti-matter.
- 14. nuclear ______ the process by which an unstable atomic nucleus loses energy by radiation.
- 15. _____ force is strong compared to electrical and gravitational forces.
- 17. ______is responsible for the heat from inside the Earth.
- 19. These have a very regular, organized structure.
- 22. A ______ ray is a penetrating form of electromagnetic radiation arising from the radioactive decay of atomic nuclei.
- 26. The most obvious example of fusion is the ____.
