Across
- 1. the number of protons in an atom of an element
- 4. Two or more atoms bonded together.
- 7. The basic unit of an element. All matter is made up of atoms.
- 10. change of state from a gas to a liquid
- 11. A chart of all known elements that scientists reference when working with atoms or molecules.
- 12. any of two or more atoms of the same element that have different numbers of neutrons
- 17. change of state of a liquid into a gas
- 18. decay process that occurs when an unstable atomic nucleus changes into another more
- 21. matter that has a definite volume and a definite shape
- 23. Protons and neutrons clump together at the center of an atom to form the nucleus of an atom.
Down
- 2. describes elements that spontaneously emit radiation stable nucleus by emitting radiation
- 3. Anything that has mass and takes up space.
- 5. occurring without external force or cause
- 6. vaporization that occurs only at the surface of a liquid
- 8. A positively charged subatomic particle located at the center of an atom.
- 9. sum of the number of protons and neutrons in an atom
- 13. A subatomic particle of an atom that is negatively charged and orbits the nucleus extremely fast.
- 14. matter that has no definite volume and no definite shape
- 15. atom that is no longer neutral because it has gained or lost electrons
- 16. gas state of a substance that is normally a solid or a liquid at room temperature
- 19. matter with a definite volume but no definite shape
- 20. Area around an atomic nucleus where an electron is most likely to be found.
- 22. A subatomic particle with no charge located at the center of an atom.