Across
- 2. metals
- 7. – a scientific law that states that during a chemical reaction, matter cannot be created or destroyed
- 12. a stable subatomic particle with a charge of negative electricity,
- 14. – an atom that has gained or lost one or more electrons.
- 16. -the smallest unit of an element
- 17. Symbol –letters that represents the name of the element.
- 18. symbol Cs
- 20. – located in the outermost energy level of an atom
Down
- 1. symbol Lr
- 3. stable a stable particle with a positive charge
- 4. a vertical column
- 5. – an element that has some properties of a metal
- 6. symbol C
- 8. bomb
- 9. – a substance that cannot be broken down
- 10. the midel of an atom
- 11. symbol Fr
- 13. is a subatomic particle
- 15. – the smallest unit of a compound
- 19. a horizontal row