Radioactive Decay

2. a process that occurs when an unstable atomic nucleus changes into another more stable nucleus by emitting radiation as particles or energy.
3. Atoms of the same element that have different numbers of neutrons
6. Gamma rays have a very __________frequency
9. A nucleus that will not undergo decay is ______________
10. Defines an atom
14. changes the atom number by +1
15. In beta decay, this is added to the atomic number of the original atom
16. released when a neutron becomes a proton--beta particle
18. the area on a graph of neutron and proton ratios within which all stable nuclei are found
19. In alpha decay, this is added to the mass number of the original atom.
20. changes the atomic number by -2
21. Gamma rays have a very __________ wavelength

1. protons, neutrons, electrons
4. a type of nuclear radiation consisting of two protons and two neutrons it is positively charged and is the equivalent to the nucleus of a helium atom.
5. the sum of the number of neutrons and protons in an atomic nucleus
7. released when an unstable nucleus rearranges to a lower energy and more stable arrangement.
8. Gamma radiation added change to mass and atomic number
11. elements that spontaneously emit radiation are ____________________
12. a high-speed electron with a negative charge that is emitted during radioactive decay
13. In alpha decay, this is added to the atomic number of the original atom.
17. If a nucleus is not within the band of stability, it is considered ______________