Across
- 1. The number of protons plus neutrons is equal to the ... number.
- 3. There are only 94 ... occurring elements on the periodic table.
- 4. They are a pure substance.
- 6. Occurs when an element loses or gains a neutron in the nucleus.
- 7. What element has the symbol He?
- 10. What element is in group 2, period 2?
- 11. What is an example of a compound?
- 12. What period is gallium in?
- 13. What is the columns called on the periodic table?
- 17. Defines a materials ability to conduct electricity.
- 19. What type of radioactivity wave is the strongest?
- 20. A bunch of atoms that are bonded together.
- 22. The name of the process when a single compound breaks down to form two or more simpler products.
- 25. Which subatomic particle has a neutral charge?
- 26. Which element has only one electron?
Down
- 2. What is the name of the process where two or more substances combine to produce a single new substance?
- 5. What type of bond shares electron pairs between atoms?
- 8. Which element has the symbol Mg?
- 9. A table that arranges elements based on their properties.
- 14. What element has the symbol O?
- 15. Which element has the symbol B?
- 16. Greek word for indivisible.
- 18. What are the rows called on the periodic table?
- 21. The liquid that releases positively charged hydrogen ions.
- 23. Which subatomic particle has the symbol p+?
- 24. What is the name for element 6?