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Across

1. Which element is a silvery-white alkaline solid at room temperature ?

5. ______ is one of the main structural components of bones

9. Which element is an essential nutrient for all green plants?

10. Which is the most electro-positive element?

Down

2. Which is the most common element found on earth ?

3. Which element is used in blue ray technology, blue and green LED's, mobile phones and pressure sensor for touch switches?

4. Which element has the highest melting point?

6. Which element is common in meteroites ?

7. In 1928 _____ became available on the open market for the first time.

8. Which element is naturally anti-bacterial?

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