Across
- 3. How close to the true value results are
- 7. There are 118 of them
- 11. Solid, liquid, gas
- 13. When a gas substance forms a solid
- 14. The 16th element
- 15. Made of copper and tin
- 18. A slow chemical reaction between metal and oxygen that makes metal oxide
- 20. How close to each other the results are
- 23. Water and carbon dioxide react through sunlight
- 24. A chemical process where a substance gives off heat
- 25. Turning a solid into liquid
- 26. One of the smallest things
- 27. Created when two or more metals are combined
- 28. number The amount of protons and neutrons in an atom
- 29. An ingredient in air
Down
- 1. Able to be stretched into a wire
- 2. It means that something can be hammered into a sheet without cracked
- 4. A liquid turning into a solid
- 5. How heavy is it for its size
- 6. silver Made of silver and copper
- 8. A substance dissolved in a solution
- 9. The first element on the periodic table
- 10. Having a Ph level of less than 7
- 11. The construction of complex compounds from simpler ones
- 12. Acid A liquid made with Hydrogen
- 16. The 92nd element on the periodic table that has high radioactivity
- 17. Shiny
- 19. A chemical reaction between hydrocarbon and oxygen releasing heat and light
- 21. Reaction between oxygen and sugar
- 22. It is used by the human body