Across
- 3. a column in the periodic table of the chemical elements
- 7. is a table that tabular array of the chemical elements organized by atomic number
- 8. stable subatomic particle that has a positive charge equal in magnitude to a unit of electron charge
- 9. any substance that cannot be decomposed into simpler substances by ordinary chemical processes
- 11. the smallest particle of a substance that has all of the physical and chemical properties of that substance
Down
- 1. number the number of protons in the nucleus of an atom
- 2. composed of or resulting from union of separate elements
- 4. corresponds to the successive occupation of the orbitals in a valence shell of the atom
- 5. the basic unit of a chemical element
- 6. neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen
- 10. a very small particle of matter that has a negative charge of electricity and that travels around the nucleus of an atom