Across
- 3. table in which the elements are described
- 5. substance that cannot be broken down into other substances
- 6. element with atomic number of 26
- 7. strong, stable bond of shared electrons
- 9. center of an atom
- 10. a chemical combination, in a fixed ratio, of two or more elements
Down
- 1. atoms of an element that possess different numbers of neutrons; unstable, give off energy, can be used for tracking
- 2. weak bonds between atoms in 2 different molecules; formed when hydrogen atom (that is covalently bonded to a more electronegative atom) is attracted to an electronegative atom of another molecule
- 4. negative particle
- 8. neutral particle
- 11. positive particle