Across
- 7. the smallest unit of matter
- 9. bond between two metals
- 10. shows amount of valence electrons
- 12. on the left of the periodic table, high melting and boiling point
- 13. contains protons and nuetrons
- 15. shows energy levels in an atom
- 16. right of the staircase, low melting and boiling point
Down
- 1. contains the negatively charged electrons
- 2. shows the atomic number,mass number, charge, and element symbol
- 3. bond between two nonmetals
- 4. outermost energy level in the atom
- 5. staircase, has properties of metals and nonmetals
- 6. bond between a metal and a nonmetal
- 8. positively charged part of an atom
- 11. uncharged part of an atom
- 14. the positive or negative charge of an ion