Across
- 4. my atomic number is 47
- 6. I am the 2nd most reactive metal
- 8. eat me when you have cramps in your legs
- 11. I have 28 electrons when electrically neutral
- 12. I have 26 protons
- 13. My average atomic mass is 35.453
- 15. I am not an alkali metal, but I am in group 1
- 16. I'm an alkaline earth metal used in fireworks
Down
- 1. I am very important for healthy teeth and bones
- 2. I am a metalloid that usually has 71 neutrons
- 3. I'm the only noble gas with 2 electrons
- 5. I am a halogen with 5 energy levels
- 7. I am the only liquid metal at room temperature
- 9. I am in the fifth period and the carbon family
- 10. I have 6 valence electrons and 16 protons
- 14. I'm a gas with 8 neutrons in my most common form