Across
- 1. positive particle ejected from certain radioactive arguments
- 3. ions that are negatively charged
- 7. diagrams that represent the valence electrons of atoms within a molecule
- 12. tendency of atoms to prefer to have eight electrons in the valence shell
- 13. represent the reactants and products in radioactive decay, nuclear fission or fusion
- 15. electromagnetic radiation of the shortest wavelength and highest energy
- 16. ions that are positively charged
- 17. a tiny particle or bundle of electromagnetic radiation
- 18. the shell or orbital in which the electron is located relative to the atom's
- 20. having the least energy of all the possible states
- 21. arrangement of electrons in orbitals around an atomic nucleus
Down
- 2. spectrum of frequencies of electromagnetic radiation emitted
- 4. energy that comes from a source and travels through space at the speed of light
- 5. smallest discrete unit of a phenomenon
- 6. single electron or one of two or more electrons in the outer shell of an atom that is responsible for the chemical properties of the atom
- 8. number of waves that pass a fixed point in unit time
- 9. act of emitting radiation spontaneously
- 10. form of energy that propagates as both electrical and magnetic waves
- 11. energy level defined by quantum theory
- 14. charged particle emitted from nucleus of radioactive element
- 19. any atom or group of atoms that bears one or more positive or negative electrical charges