Across
- 4. A complete visual spectrum with no frequency gaps.
- 5. The dense central part of an atom made up of protons and neutrons.
- 8. A three-dimensional region of space around nucleus in which as many as two electrons are likely to be found.
- 13. A law stating that every compound is formed of elements combined in mass ratios that are unique for that compound.
- 14. Having to do with quantities in which there are only separate, discrete values allowed.
- 17. The nucleus of the helium atom produced as the byproduct of a nuclear decay process.
- 18. A neutral particle in an atom's nucleus.
Down
- 1. The number of protons in the nucleus of an atom.
- 2. A spectrum showing only certain colors or wavelengths of light.
- 3. The principle that it is impossible to know both the energy or momentum (velocity) and the exact position of an electron at the same time.
- 6. An atom's lowest energy state.
- 7. A neutral particle with a centrally located nucleus, consisting of protons and neutrons, with electrons around it: The smallest particle that that makes up an element and that is capable of chemical interactions.
- 9. A particle in an atom's nucleus with a +1 charge and a mass of 1.673x10^-27
- 10. The concept that if waves can behave like particles, then particles can also behave like waves.
- 11. A region around the nucleus containing a specified group of electrons in sub-levels and orbitals.
- 12. A packet of electromagnetic energy modeled as a particle that transmits electromagnetic force in the standard form of matter.
- 15. The stream of electrons emitted from the cathode in a cathode-ray tube.
- 16. A particle with a -1 charge and a mass of 9.11x10^-31 kg found orbiting the nucleus in an atom.