Across
- 2. shows the type and number of atoms in a molecule
- 4. when particles of different substances rearrange creating new substances
- 11. smallest particle of matter
- 13. one or two letters used to represent an element.
- 15. substances composed of many different particles
- 16. copy and pasting DNA from one organism to another
- 17. characteristic of substances that describe how likely they are to engage in chemical reactions with other substances
- 19. substances present before chemical reaction
- 20. amount of matter in an object
- 21. physical property where molecules of substances do not spread out to create a mixture with other substances
- 22. physical property where molecules of substances spread out to create a mixture with another substance
- 23. amount of space an object occupies
- 24. substances present after chemical reaction
- 25. mathematical relationship between the amount of mass and how much volume it is in
Down
- 1. particle made of many atoms bonded together
- 3. number of protons in an atom and is used to identify each element
- 5. chemical reaction in plants turning water, sunlight and CO2 into oxygen and sugar
- 6. organized chart showing repeating patterns on known elements
- 7. characteristic of substance that can be measured or observed with senses
- 8. atoms are not created or destroyed in chemical reactions
- 9. substance composed of all the same atom
- 10. any pure substance that we know the composition of the particles
- 12. anything that has mass and takes up space
- 14. chemical property of substances that react rapidly with oxygen producing a flame
- 17. substance composed of all the same molecule
- 18. substances composed of only one particle