Across
- 1. the way all elements are organised onto a document
- 9. the number used to arrange elements on the periodic table
- 13. a pure substance that has only one type of atom
- 15. to carry out an experiment
- 16. a column in the periodic table
- 18. one or two letters used to represent an element
- 19. a conclusion made using evidence
- 20. make a judgement or approval based on evidence
- 21. a highly reactive, soft, shiny metal
Down
- 2. elements that are chemically bonded to create something else
- 3. describe how something is similar or different to something else
- 4. the smallest unit of ordinary matter in the universe
- 5. to make a suggestion as to what is going to happen next
- 6. a gas that is very non-reactive
- 7. the way letters are organised to symbolise compounds
- 8. to make minor changes or to adjust
- 10. molecules that are mixed together but not chemically bonded
- 11. when every atom in a solid is chemically bonded
- 12. a row in the periodic table
- 14. two or more atoms bonded together
- 17. a section of data that is very different to the others