Across
- 1. elements in the top row below the main table, also called rare earth metals
- 6. rows in the periodic table
- 8. occurring in a regular, repeating pattern
- 10. elements with properties of both metals and nonmetals
- 11. a one- or two-letter abbreviation for an element
- 12. substances made of only one type of atom
- 13. a chart showing all elements arranged by repeating patterns of properties
- 14. elements in the bottom row below the main table that are radioactive
- 15. elements that are typically shiny, conductive, and found on the left side of the table
Down
- 2. elements that are poor conductors and found on the right side of the table
- 3. the number of protons in an atom’s nucleus
- 4. columns in the periodic table that contain elements with similar properties
- 5. (amu) units used to measure the mass of atoms
- 7. characteristics of a substance that can be observed or measured
- 9. the average mass of all the isotopes of an element