Across
- 5. same number of protons in each atom
- 6. the amount of time required for a quantity to fall to half of its value
- 7. he produced and detected electromagnetic radiation in a wavelength range today known as x-rays
- 8. a series of fission reactions that occur because the products released during one fission reaction causes fission reactions in other atoms
- 13. extremely high frequency and therefore high energy per photon
Down
- 1. radiation with wavelengths between those of visible red light and radio waves
- 2. high-energy electrons emitted by certain types of radioactive nuclei
- 3. work needed to accelerate a body of a given mass from rest to its stated velocity
- 4. mass of an atomic particle
- 8. particles that don't have enough energy to take away electrons from atoms
- 9. he is known as the father of nuclear physics
- 10. number of protons in an element
- 11. with wavelengths in the electromagnetic spectrum longer than infrared light
- 12. particles that take away electrons from atoms by using kinetic energy