Across
- 2. : Number used to identify an element.
- 6. : Property that allows metals to be pulled into wires.
- 9. : Horizontal rows on the periodic table.
- 12. : Diagram showing valence electrons around an atom.
- 16. : Group that contains elements often used in wires and jewelry.
- 19. : Elements that are usually dull, brittle, and poor conductors.
- 20. : Ability of a material to transfer heat or electricity.
- 21. : Negatively charged ion.
- 22. : Radioactive metals including uranium and plutonium.
- 23. : How electrons are arranged around the nucleus.
- 25. : Scientist who rearranged the table by atomic number.
- 26. : Group 18 elements that are stable and rarely form compounds.
- 27. : Vertical columns on the periodic table.
- 28. : Property that allows metals to be hammered into thin sheets.
- 29. : Substance made of one type of atom.
- 30. : Group 17 elements that are highly reactive nonmetals.
Down
- 1. : Electrons in the outermost energy level.
- 3. : Scientist who created the first widely accepted periodic table.
- 4. : Rare-earth metals used in electronics and strong magnets.
- 5. : Group 1 elements that are extremely reactive, especially with water.
- 7. : Bond formed when electrons transfer between atoms.
- 8. : Most reactive nonmetal.
- 10. : Group 2 metals that are reactive but less so than Group 1.
- 11. : Elements with properties of both metals and nonmetals.
- 13. : Rule that atoms want eight electrons in their outer shell.
- 14. : How easily an element combines with other elements.
- 15. : Positively charged ion.
- 17. : Property Mendeleev used to originally arrange the periodic table.
- 18. : Elements that are typically shiny, conductive, and malleable.
- 24. : Two electrons shared or bonded together.