Across
- 2. a particle with one unit of positive electric charge
- 7. a group of elements that conducts heat and electricity; they are found on the upper left to the bottom of the periodic table
- 9. the way light bounces off an object; some metals, a mirror, or water has this property
- 11. these are formed by the chemical combination of two or more elements
- 15. the smallest unit of an element with the properties of that unit
- 17. smaller particles with one unit of negative electric charge
- 18. a particle with no electric charge (neutral charge)
- 19. more than one atom joined together
- 20. these share properties of both metals and nonmetals and they make excellent semiconductors
Down
- 1. process where metals react with materials in the air, causing the metal to rust or tarnish
- 3. material that transmits, transfers, or moves heat and electricity easily
- 4. the center of an atom
- 5. a material that stops or slows the flow of energy, such as electricity or heat
- 6. measure of how resistant a material is to scratching, bending, or denting
- 8. the number of protons in an atom
- 10. a material that cannot be broken down into anything simpler by chemical reactions
- 12. the ability of an object or material to be pushed or pulled by a magnet
- 13. the ability to be bent, flattened, hammered, or pressed into new shapes without breaking
- 14. an element that does not have the properties of metal; they are poor conductors of heat and electricity
- 16. the ability to be pulled into thin wire without breaking