Across
- 2. attractive or repulsive forces between particles that are caused by their electric charges
- 6. compound containing H2O molecules
- 7. a discrete quantity of energy proportional in magnitude to the frequency of the radiation it represents.
- 8. E=hf
- 10. the minimum energy that is required to disassemble the nucleus of an atom into its constituent protons and neutrons, known collectively as nucleons.
- 11. neutrons and protons added together
- 18. one element that has different number of protons but same number of neutrons
- 22. when a substance emits alpha particles as radioactive decay
- 24. a nuclear reaction in which a heavy nucleus splits spontaneously or on impact with another particle, with the release of energy.
- 25. the substance that remains after water molecules are removed
- 28. mass of element/molecular mass x 100
- 29. 1.6022×10−13 J
- 30. an emission spectrum consisting of separate isolated lines.
- 31. positively charged ion
- 33. a nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus with the release of energy.
- 34. the stability of elements determined by the ratio of the number of neutrons to the number of protons in the nucleus
- 36. wavelength=velocity/frequency
- 37. a particle representing a quantum of light or other electromagnetic radiation. A photon carries energy proportional to the radiation frequency but has zero rest mass.
- 38. number of neutrons and protons in the nucleus
- 39. mass/total mass x 100
- 40. the difference between the mass of an isotope and its mass number
Down
- 1. represents the reactants and products in radioactive decay, nuclear fission, or nuclear fusion
- 3. the range of wavelengths or frequencies over which electromagnetic radiation extends.
- 4. the center of the atom
- 5. an emission spectrum that consists of a continuum of wavelengths.
- 9. negatively charged ion
- 12. decimal notation
- 13. what emits during beta radiation
- 14. Δm = [Z(mp + me) + (A – Z)mn] – matom
- 15. Hertz
- 16. subatomic particle that has no charge
- 17. radioactive decay with no charge
- 19. red number on periodic table
- 20. positively charged subatomic particle
- 21. any of four independent sets of unstable heavy atomic nuclei that decay through a sequence of alpha and beta decays until a stable nucleus is achieved.
- 23. The fundamental force of nature that holds protons and neutrons together in the atomic nucleus.
- 26. emittance of a helium nucleus in a form of radiation
- 27. ax10^b
- 32. when a substance emits beta particles
- 35. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons