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Chapter 5 Vocabulary
Term | Definition |
---|---|
Period | Each row in table of elements |
Group | Each column on the periodic table defining valence numbers per element |
Periodic Law | Pattern of repeating properties |
Atomic mass unit | One twelfth of a carbon -12 atom |
Metals | Good conductors of heat and electricity. |
Transition metals | forms a bridge from the left and right sides of the periodic table. |
Nonmetals | poor conductors of heat and electric currents |
Metalloids | properties falling between metals and nonmetals. |
Valence Electron | Electron in the highest occupied energy level |
Alkali Metals | Elements in group one |
Alkaline earth metals | All elements in group two |
Halogens | Elements in group seven |
Noble gases | Elements in group eight |
Periodic table | Arrangement of elements in a column based on properties that repeat row to row. |