click below
click below
Normal Size Small Size show me how
Rachel Berlin
chapter 5 vocabulary
Term | Definition |
---|---|
period | a row in the periodic table of elements |
group | a column of elements in a periodic table |
periodic law | the pattern of repeating properties displayed by the elements in the periodic table |
atomic mass unit (AMU) | one twelfth the mass of a carbon-12 atom |
metals | elements that are good conductors of heat and electric current |
transition metals | elements that form a bridge between elements on the left and right sides of the periodic table |
nonmetals | elements that are poor conductors of heat and electric current |
metalloids | elements with properties that fall between those of metals and nonmetals |
valence electron | an electron that is in the highest occupied energy level of an atom |
alkali metals | the elements in group 1A of the periodic table, not including hydrogen |
alkaline Earth metals | the elements in group 2A of the periodic table |
halogens | the elements in group 7A of the periodic table |
noble gasses | the elements in group 8A of the periodic table |
periodic table | an arrangement of elements in columns, based on a set of properties that repeat from row to row |