Across
- 3. the total number of protons and neutrons in an atom.
- 5. the release of energy from the decay of the nuclei of certain kinds of atoms and isotopes
- 7. equal to the number of protons in the nucleus
- 9. A charged particle with a mass equal to that of a proton
- 11. A charged particle (with a mass equal to 1/1837 that of a proton
- 12. a subatomic particle with a positive electric charge.
- 14. atoms are realsed which realses energy
Down
- 1. a series of events so related to each other that each one initiates the next.
- 2. a form of electromagnetic radiation
- 4. composite particles consisting of two protons and two neutrons tightly bound together
- 6. the process by which two light atomic nuclei combine to form a single heavier one
- 8. center of the atom
- 10. has a mass equal to the mass of a proton,
- 13. atoms that have the same number of protons and electrons but different numbers of neutrons