Across
- 4. A reactive metal with symbol K, important in fertilizers and plant growth.
- 6. A compound formed when a metal reacts with nitrogen.
- 7. A soft, reactive metal with symbol Na, commonly found in salt compounds.
- 10. A gas element with symbol O that reacts with many substances during combustion.
- 11. A rule or system agreed upon by scientists worldwide to ensure uniform understanding.
- 12. A compound formed when an element reacts with oxygen.
- 14. An ancient language from which some element symbols are derived (e.g. Fe from Ferrum).
- 15. A light, corrosion-resistant metal used in aeroplanes and overhead cables.
Down
- 1. A substance that takes part in a chemical reaction and changes into something new.
- 2. A substance containing elements like nitrogen, potassium, and phosphorus that improves soil fertility.
- 3. A chemical equation written using words instead of symbols to show a reaction.
- 5. A one- or two-letter abbreviation used to represent an element in chemistry.
- 8. A strong metal with symbol Fe, widely used in construction and tools.
- 9. A new substance formed as a result of a chemical reaction.
- 13. A pure substance made of only one type of atom that cannot be broken down chemically.