Across
- 1. n. things that are formed during a chemical reaction
- 7. n. the gas we breathe every day
- 8. n. a pure substance made up of two or more elements
- 9. n. the element that made Marie Curie famous
- 10. adj. something that happens or recures in cycles
- 12. n. the basic particals of the chemical elements
- 13. n. a mineral that plays a role in red blood cell production
- 14. n. the first manmade element
- 16. n. the metal used to make Iphone 16 Pro
- 17. n. the most gas in the air
- 18. n. two or more atoms joined together
- 20. n. the last element in the table
- 22. n. a negatively charged particle
- 23. n. a measure of how much mass is in a given volume
- 24. n. a particle with no charge
Down
- 2. n. the mineral that plays a crucial role in building bones and teeth
- 3. n. is a molecule involving the sharing of electrons between atoms
- 4. n. the 1st element in the periodic table
- 5. n. a radioactive element used in smoke detectors
- 6. n. a precious metal that is given to No.1's in competitions
- 10. n. a postively charged particle
- 11. n. something that happens during an exeriment,usually produces new products
- 15. n. one thing
- 19. n. a unit of measurement used to express the amount of substance
- 21. n. a molecule or ion capable of donating a proton