Across
- 2. a chart showing all of the elements arranged according to the repeating patterns of their properties
- 3. negatively charged particles in in atom
- 6. particle located in the nucleus that contains no charge
- 9. the smallest particle that can still be considered an element
- 10. the average mass of all the isotopes of that element
- 12. positively charged particle in an atom's nucleus
- 13. the number of protons in the nucleus of an atom
- 14. an explanation that may change with new evidence
- 15. rows in the periodic table
Down
- 1. something that helps describe or visualize another thing
- 4. one-or-two letter abbreviation for an element
- 5. elements in the same vertical column of the periodic table; also called family
- 7. how an isotope is identified
- 8. atoms with the same number of protons and different numbers of neutrons
- 11. the dense, positively charged center of the atom