Across
- 5. a substance that you cannot tell its ingredients apart
- 10. another word for ingredients
- 12. negatively charged sub-particles
- 13. two or more elements combined
- 15. this element has 3p, 4n, 3e
- 18. are the last group of the periodic table (18) and are stable elements
- 21. neutral charged sub-particles
- 22. a material that is man-made
Down
- 1. the process where organisms use carbon dioxide, water and light energy to make glucose
- 2. a substance made of only one type of atom
- 3. another word for result
- 4. a substance whose ingredients you can tell apart
- 6. another word for sugar
- 7. are the 1st group of the periodic table(1) and these are very unstable and reactive
- 8. this element has 6p, 6n, 6e
- 9. when a substance changes only its appearance
- 11. positively charged sub-particles
- 14. anything that has mass and takes up space
- 16. is the symbol for mercury
- 17. this model contains each element and properties
- 19. is the element represented by the chemical symbol k
- 20. when a substance changes the way it looks and its composition
- 21. is the chemical symbol for sodium
- 23. a symbol used to represent equal in a chemical equation