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Quinn Science K5

The Periodic Table

QuestionAnswer
periodic having a regular, repeating pattern
periodic law states that the chemical and physical properties of elements are periodic functions of their atomic number
period horizontal row of elements on the periodic chart,elments have a regular repeating pattern of properties
group column of elements ot the periodic chart, elements have similiar properties
alkali metals metals, 1 valence electron, most reactive metals, soft, silver, shiny, and low density, group 1
alkaline - earth metals metals, 2 valence electrons, very reactive but less than gruop 1, silver, more dense than group 1, group 2
halogens nonmetals, 7 valence electrons, very reactive, poor conductors, react violently with group 1 to form salts, never found uncombined, group 17
noble gases nonmetals, 8 valence electrons (2 for helium), complete outer shell, unreactive, colorless, oderless, gasses, group 18
metals most elements, left of zigzag line on periodic table, few electrons in outer energy level, most are solids, malleable, good conductores, ductile, and shiny
nonmetals right of the zigzag ling on the periodic chart, complete or almost complete set of valence electrons, most are gases, dull, poor conductors, not malleable or ductile,
metalloids semiconductors, border the zigzag line on the periodic chart, about half of the valence electrons, have some properites of metals and nonmetals
chemical symbol international committee of scienctists aprove the name and symbol, usually consists of one or two letters, the first is always capitalized rest lower case
transition metals metals, 1 or 2 valence electrons, less reactive than groups one or two, shiny, good conductors, higher density and melting point than groups one or two (except mercury), groups 3 through 12
lanthanides follow the transition metal lanthanum, shiny, reactive, metals,
actinides follow the transition metal actinium, shiny, reactive, metals, all are radioactive and unstable
boron group one metalloid and four metals, 3 valence electrons, reactive, solids, group 13
carbon group one nonmetal, two metalloids and two metals, 4 valence electrons, reactivity varies, solids, group 14
nitrogen group two nonmetals, two metalloids and one metal, 5 valence electrons, reactivity varies, solids except nitrogen, group 15
oxygen group three nonmetals, one metalloid and one metal, 6 valence electrons, reactive, solids except oxygen, group 16
hydrogen colorless, oderlass, gas, low density, reacts explosively with oxygen, one valence electron
Created by: cquinnd15.org