PERIODIC TABLE
Across
- 5. The basic building block of all matter
- 8. Negatively charged particle
- 9. - Solid state of water
- 11. - has no protons
- 16. A row in the periodic table
- 17. - Iron, gold, silver
- 18. holds only two electrons
- 19. gases, helium, argon, neon, krypton, radon, xenon
- 21. A pure substance made from a single type of atom
Down
- 1. When a solid turns into a liquid
- 2. A ____ reaction is when a set of substances undergo a chemical change and form a different substance
- 3. These elements include fluorine, chlorine, bromine, iodine, and astatine
- 4. Number of protons in an element is the atomic ____
- 6. - drawn into fine wire
- 7. A metal that combines two or more elements such as bronze or steel
- 10. These particles are positive
- 12. A column in the periodic table
- 13. Center of an atom
- 14. Isotopes of the same element have a different number of these
- 15. A mixture where one substance dissolves in the other
- 17. - bent into shape
- 20. Metals conduct heat and ____ well