Across
- 3. elements that have properties of both metals and nonmetals
- 8. the flow of electric charge
- 10. separate atomic regions surrounding the nucleus where electrons are found, also known as shells
- 12. metals that begin in the fourth period and whose reactivity involves the second-to-outermost shell
- 14. elements in column one that have just one electron in their outermost shells and are highly reactive
- 15. indicates how many protons an atom of each element has in its nucleus
- 16. solid substances that conduct electricity better than insulators, but not as well as conductors
- 19. the relative ability of an atom or molecule to undergo a chemical reaction with another atom or molecule
- 20. elements in column eight that have full outer shells and are inert
- 21. the transfer of electric charge without direct contact
- 22. the vertical columns of the periodic table
Down
- 1. energy that travels through space in the form of waves
- 2. a region around a magnet or current where magnetic forces can be detected
- 4. the transfer of electric charge through direct contact
- 5. metals metals that are softer than other metals and melt and boil at lower temperatures
- 6. not chemically reactive
- 7. an atom that has lost or gained electrons
- 9. the outer energy level of an atom that contains electrons involved in chemical reactions
- 11. lost or gained electrons and became an ion
- 13. substances made up of two or more elements that have bonded chemically to form molecules
- 17. the type of bond formed when atoms share their outermost electrons in order to end up with full outer shells
- 18. the horizontal rows of the periodic table