Across
- 2. An element in Group 2 of the periodic table, having two valence electrons that it tends to lose easily to become a 2 + cation, making it very reactive.
- 4. of a neutral atom. Unpaired valence electrons are
- 8. A row in the periodic table of the elements; also called a series. (2) The time interval (7) for one complete cycle of periodic motion.
- 9. the distance from the center of an atom's nucleus to its outermost energy level.
- 10. table, typically having one or two valence
- 11. A representation of an atom
- 13. Any electron in the outermost energy
- 14. See family.
- 16. Any elements in Groups 3–12 of the
- 21. An element with characteristics between those of metals and nonmetals; also called semiconductors; located between metals and nonmetals on the periodic table.
- 22. An element that typically has four or more valence electrons and that does not exhibit the general properties of metals; located on the right side of the periodic table.
- 23. A column of elements in the periodic table having similar valence electron arrangement, resulting in similar chemical properties; also known as a group.
- 24. An element that is typically dense, solid, ductile, malleable, highly conductive, and chemically reactive, especially in the presence of nonmetal elements. Metals are located on the left end of the periodic table.
Down
- 1. An element in Group 17 of the periodic table having seven valence electrons. It easily gains an electron, forming a 1 - anion, which causes it to be highly reactive.
- 3. The law that states that the properties of
- 5. An element from either of two rows usually placed below the periodic table; a member of either the lanthanide or actinide series. It typically has two valence electrons.
- 6. of its chemical symbol with surrounding dots representing its valence electrons.
- 7. Any of Groups 13-16 in the periodic table; so named because they contain metals, nonmetals, and metalloids. These groups are often named for the first element in the family.
- 12. elements vary with their atomic numbers in a regular, repeated pattern.
- 15. involved in chemical bonding.
- 17. A measure of an element's ability to attract and hold electrons when bonded to other atoms.
- 18. A table of the chemical elements arranged to display their periodic properties in relation to their atomic numbers.
- 19. which it easily loses, resulting in cations withcharges of 1 + or 2 +
- 20. An element in Group 18 on the periodic table having eight valence electrons that fill the outer energy level. (Helium is an exception with only two.) With a full outer energy level, it is inert (i.e., nonreactive).