Across
- 5. group- Any 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.
- 8. A measure of an elements ability to attract and hold electrons when bonded to other atoms.
- 10. An element with characteristics between those of those metals and nonmetals, also called semi-conductors, located between metals and nonmetals on the periodic table.
- 11. An element that is typically dense,solid,ductile,malleable,highly conductive, and chemically reactive, especialy in the presence of nonmetal elements. Metals are located on the left end of the periodic table.
- 15. metal- An element in Group 2 of the preiodic table, having two valence electrons that it tends to lose easily to become a 2+ cation, making it very reactive.
- 16. A row in the periodic table of the elements also called a series. The time interval for one complete cycle of periodic motion.
- 17. dot notation- A representation of an atom consisting of its chemical symble with surrounding dots representing its valence electrons.
- 19. metal- Any elements in Group 3-12 of the periodic table, typically having one or two valence electrons, which it easily loses, resulting in cations with charges of 1+ or 2+.
Down
- 1. electron- Any electron in the outermost energy level of a neutral atom. Unpaired valence electrons are usually involved in the chemical bonding.
- 2. table- A table of the chemical elements arranged to display their periodic properties in relation to their atomic numbers.
- 3. a set of elements
- 4. A column of elements in the periodic table having similar valence electron arrangement, resulting in similar chemical properties, also known as a group.
- 6. radius- The distance from the center of an atom's nucleus to its outermost energy level.
- 7. metal- An element in Group 1 of the periodic table, having one valence electron that it can easily lose to from a 1+ cation, making it extreamly reative;the most reactive of all the metals.
- 9. 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.
- 12. Law- The law that states that the properties of the elements vary with their atomic numbers in a regular, repeated pattern.
- 13. transition metal- An element from either of two rows usually placed below the periodic table; a member of either lanthanide or actinide series. It typically has two valence electrons.
- 14. An element in Group 17 of the periodic table having seven valence electrons. It easily gains an electric, forming a 1- anion, which causes it to be highly reactive.
- 18. Gas- An element in Group 18 on the periodic table having eight valence electrons that fills the outer energy level. Helium is an exception with only two. With a full outer energy level, it is insert.