Across
- 4. Unit of energy
- 5. The difference between the actual mass from the predicted mass is the mass ________
- 8. Where beta particles originate
- 9. A positively charged particle made up of two protons and two neutrons and released by a radioactive nucleus
- 12. Alpha radiation are ______ charged particles
- 13. Another element discovered by the Curies
- 15. the changing of an atom into another kind of atom that takes place during radioactive decay
- 19. the first city in the world to be devastated by an atomic bomb
- 20. An unstable form of a chemical element that radioactively decays, resulting in the emission of nuclear radiation.
- 21. Stops Gamma rays
- 22. technique used to date materials such as rocks, usually based on a comparison between the observed abundance of a naturally occurring radioactive isotope
- 24. Discovered the element Uranium
- 28. Same number of protons, but a different number of neutrons
- 29. Element discovered by the Curies
- 31. A unit that measures the number of decays per second, or activity, from a sample of radioactive nuclei
- 32. Iron and nickel nuclei have the largest binding energies per nucleon of all nuclei and therefore are the most _______
- 33. quantum of light and all other forms of electromagnetic radiation, and the force carrier for the electromagnetic force
- 35. A unit for measuring biological damage from radiation
- 36. Use of radioactive materials in medicine
- 37. Elements with an atomic number over 84
- 40. Country where catastrophic nuclear accident occurred
- 41. Stops alpha radiation
- 42. E=mc2 was discovered by ______
- 44. An Example of non-ionizing radiation
- 46. Chemical symbol of Neptunium
- 48. Protons and neutrons in the nucleus
- 49. The process by which multiple nuclei join together to form a heavier nucleus
Down
- 1. Coined the term "Radioactivity"
- 2. Device or furnace where controlled fission chain reaction is carried out
- 3. An electron released by a radioactive nucleus that causes a neutron to change into a proton
- 6. A process in nuclear physics in which the nucleus of an atom splits into two or more smaller nuclei
- 7. High-energy electromagnetic radiation released by a radioactive nucleus are called _____ rays
- 10. particles, Beta particles, Gamma rays) are not affected by a magnetic field because they carry no ______ charge
- 11. The ______ mass of a reaction is the amount of fissionable material to make each reaction produce one more
- 14. Chemical Symbol of Americanum
- 16. A version of a chemical element that has an unstable nucleus and emits radiation during its decay to a stable form
- 17. Leading country that generates the most amount of nuclear energy
- 18. A unit for measuring absorbed energy from radiation
- 22. Father of Nuclear Physics
- 23. Too much exposure from radioactive can lead to ________
- 25. How many types of radioactive rays exist?
- 26. Time it takes to decrease into half of its original value
- 27. Discovered Radioactivity
- 30. Stops beta particles
- 31. The ______ energy is the energy released as all the constituent particles (n, p and e) come together FROM INFINITY under both the STRONG force and the EM force
- 34. Part of a nuclear reactor that slows down the neutron produced by fission
- 38. A unit that represents the rate of radioactive decay which is 3.7 × 1010 radioactive disintegrations per second
- 39. Beta particles are also ______
- 43. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons
- 44. Protons do not repel each other in the nucleus because of the ______ force
- 45. a distinct kind of atom or nucleus characterized by a specific number of protons and neutrons.
- 47. An alpha particle is actually a nucleus of ______
- 49. Mass of the Alpha particle