Across
- 2. a positively charged subatomic particle that is found in the nucleus of an atom
- 3. an ion with a positive charge
- 5. elements that are good conductors of heat and electricity
- 7. a substance that cannot be broken down into simpler substances
- 9. an electron that is in the highest occupied energy level of an atom
- 14. a negitively charged subatomic particle that is found in the space outside the nuclues of an atom
- 16. the dense positively charged mass located in the center of an atom
Down
- 1. an arrangment of elements in columns based on a set of properties that repeat from row to row
- 4. the smallest particle of an element
- 5. elements with properties that fall between those of metals and nonmetals
- 6. the pattern of repeating properties displayed by elements in the periodic table
- 8. elements that are poor conductors of heat and electricity
- 10. a unique number for each element that equals the number of protons in an atom of that element
- 11. the elements in group 8A of the periodic table
- 12. a nuetral subatomic particle that is found in the nuclues of an atom
- 13. atoms of a given element that have different numbers of nuetrons and different mass numbers
- 15. an ion with a negitive charge
