Across
- 4. A chemical species formed when two elements join together?
- 7. A gas in an atmosphere that absorbs and emits radiation within the thermal infrared range?
- 9. A reaction that takes heat in?
- 10. Takes up 78% of the Earth's atmosphere?
- 12. Fuel, Heat and Oxygen?
- 15. The process of applying a protective zinc coating to steel or iron, in order to prevent rusting?
- 16. A reaction that gives off heat?
Down
- 1. Formed by the reaction of iron and oxygen in the presence of water or air moisture?
- 2. Two or more atoms that have been chemically combined to form a single species?
- 3. The sequence of exothermic chemical reactions between a fuel and an oxidant accompanied by the production of heat and conversion of chemical species?
- 5. Takes up 21% of the Earth's atmosphere?
- 6. Takes up 0.04% of the Earth's atmosphere?
- 8. Takes up 0.9% of the Earth's atmosphere?
- 11. Smallest stable particle?
- 13. An atom or molecule that has gained or lost one or more of its valence electrons?
- 14. A substance that contains only one type of atom?
- 17. Two or more substances which have been combined such that each substance retains its own chemical identity?