Across
- 3. name for vertical lines on the periodic table
- 6. the same elements but have a different number of neutrons
- 7. two or more elements that are not chemically combined
- 8. where non-metals are found on the periodic table
Down
- 1. particle found in the nucleus with a positive charge
- 2. a more common name for group 7 elements
- 4. charge of the ion formed when an atom loses an electron
- 5. name for horizontal lines on the periodic table