Periodic Table Crossword

3. found in nuts, fruits, and leafy green veggies discovered in 1808
7. used in balloons and MRI machines
8. our air is around 78% of this element
10. a mineral that enhances food's flavor and is commonly added to processed foods
13. essential for living organisms and is what diamonds are made of
14. John William Strutt helped discover this gas in 1894
17. deficiencies can cause muscle cramps atomic mass is 24.305
18. found in leafy greens and dairy, used for healthy bones and teeth

1. in its pure form it does not smell like rotten eggs
2. this element, we need to drink
3. looks metallic Gray with atomic number 4
4. A type of gas that helped the 1980s glow
5. found in every human cell, symbol is 16th in the alphabet
6. protects teeth, and too much is highly toxic
9. a famous valley, shares this name
11. used to disinfect water for swimming and drinking
12. a type of electrolyte found in fruit that monkeys like to eat
15. covers food in the oven also the most abundant metal in the earth's crust
16. major producers of this element are phytoplankton and trees
19. discovered in 1817 and is commonly used in batteries