Across
- 4. A white metal used in making jewelleries
- 5. A gas that is essential for respiration
- 6. This element is found in chalk, limestone, and the human bones
- 8. An element with atomic number 50
- 9. A metal that is liquid at room temperature
- 10. This element’s symbol is 'Au'
Down
- 1. The lightest element
- 2. A noble gas used in balloons
- 3. A metal used in batteries
- 4. This element belongs to first group and third period
- 7. This element is used in pencils