Across
- 6. A whole number that indicates the number of protons in each atom of the element
- 9. Two or more atoms bonded together; can be multiple elements or the same kind of element
- 10. A region around the nucleus of an atom where electrons are found
- 13. A pure substance made of only one kind of atom; appears on the Periodic Table
- 14. Elements that are good conductors of electric current and heat.
- 16. Elements that have low conductivity, are not ductile, not malleable, brittle, and/or dull; some are a gas at room temp
- 18. A material that does not allow heat or electricity to move through it easily.
- 20. A horizontal row of elements in the periodic table whose properties change in predictable ways
- 21. The ability of an object to transfer heat or electricity to another object.
Down
- 1. A term used to describe a material that can be pulled out into a long wire.
- 2. Easily broken; not flexible
- 3. A number, usually a decimal, of the average mass of all the isotopes of an element. Also called a Mass Number.
- 4. Center of an atom, where the protons and neutrons are found
- 5. Elements that have properties of both metals and nonmetals.
- 7. A subatomic particle that has no charge and that is found in the nucleus of an atom
- 8. A chart of the elements showing the repeating pattern of their properties
- 11. A subatomic particle that has a negative charge and is found outside the nucleus
- 12. The way a substance reflects light from its surface
- 15. Smallest particle of an element that still has the properties of that element
- 17. Something that can be hammered out into thin sheets
- 19. Vertical column of elements in the periodic table with similar properties
- 20. A subatomic particle that has a positive charge and that is found in the nucleus of an atom