Across
- 6. each box represents one _____ of that element
- 7. Elements in the middle of the periodic table are the _____ metals
- 12. the vertical columns on the periodic table
- 13. your school's mascot
- 14. the horizontal rows are called _____
- 15. negatively charged, outside the nucleus
Down
- 1. positively charged, inside the nucleus
- 2. Group 1 metals
- 3. abbreviated version of the element
- 4. Group 18 on the periodic table
- 5. most of the elements are different types of _____
- 8. Group 2 metals
- 9. sum of the protons and neutrons
- 10. outermost electrons and shells
- 11. this is the amount of protons in an atom