Across
- 1. The 2nd most abundant element in Earths crust
- 4. I'm a valuable metal with an atomic # of 79
- 5. I'm known as the building block of life
- 8. I have 26 protons
- 9. My atomic number is 47. I make great jewelry
- 11. An atomic number of 53; member of the halides
- 12. I'm the first element in the fourth period
- 13. I'm a noble gas with 2 electrons very light
- 14. I have an atomic mass of 35.453
- 17. I have 16 total electrons in my 3 shells
- 20. A transition metal;30 electrons-used in paint
- 21. I'm metal with 28 electrons
Down
- 2. I'm a gas with 8 protons and 8 neutrons
- 3. I'm in the boron family and a common metal
- 5. I have 20 neutrons and am in teeth and bones
- 6. With 16 neutrons, I am in the nitrogen family
- 7. I'm naturally a gas with a mass number of 19
- 10. Member of carbon family. No longer in pencils
- 15. I have 1 proton but am not an alkali metal
- 16. The only halide element that's a liquid
- 18. I'm a metal that's liquid at room temp.
- 19. I'm in the carbon family in the fifth period