Across
- 4. a diagram used to show the energy of electrons within the sublevels of an atom or atoms when used in bonding
- 6. the distance between identical points, or adjacent crests, in the adjacent cycles of a waveform signal propagated in space or along a wire
- 7. a symbolic notation of the manner in which the electrons of its atoms are distributed over different atomic orbitals
- 8. an electromagnetic wave with a wavelength in the range 0.001–0.3 m, shorter than that of a normal radio wave but longer than those of infrared radiation
- 10. of light a fundamental physical constant that is the speed at which electromagnetic radiation travels in a vacuum and that has a value of 299,792,458 meters per second
- 12. electrons in the outermost shell of an atom
- 15. a letter or pair of letters used to represent a chemical element
- 17. a constant that gives the unvarying ratio of the energy of a quantum of radiation to its frequency and that has an exact value of 6.62607015 × 10−34 joule seconds
- 20. an uncharged atomic particle that has a mass nearly equal to that of the proton
- 21. diagram that describes the chemical bonding between atoms in a molecule
- 22. the rate at which a vibration occurs that constitutes a wave, either in a material (as in sound waves), or in an electromagnetic field (as in radio waves and light), usually measured per second
- 23. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons
- 24. an electromagnetic wave of a frequency between about 104 and 1011 or 1012 Hz, as used for long-distance communication
- 25. a subatomic particle with a positive electrical charge
Down
- 1. an invisible ray that is part of the energy that comes from the sun
- 2. the smallest unit into which matter can be divided without the release of electrically charged particles
- 3. spectrum The complete range of all types of radiation that has both electric and magnetic fields and travels in waves
- 5. each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter
- 9. the quantity of matter contained in an atom of an element
- 11. a negatively charged subatomic particle that can be either bound to an atom or free
- 13. number the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table
- 14. the elemental symbol of the last noble gas prior to that atom, followed by the configuration of the remaining electrons
- 16. the maximum extent of a vibration or oscillation, measured from the position of equilibrium
- 18. A form of a chemical element in which the atoms have the same number of protons but with a different number of neutrons
- 19. the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization