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16 Cards in this Set
- Front
- Back
metals |
Found on the left side of table.Lose electrons to form positive ions (cations)Most are silver, shiny, solid, malleable, ductile, and goodheat/electrical conductors |
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nonmetals |
Found on the right side of table.Gain electrons to form negative ions (anions) |
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metalliods |
Share properties of metals and nonmetals |
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period |
Horizontal rowsShare the same number of energy levels |
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group |
A group/family is a vertical columnThey have similar propertiesSame # of valence electrons |
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atomic number |
The number of protonsin an atom |
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atomic mass |
The mass of an atom. It iscalculated by using the ratios of howoften the mass numbers (protons +neutrons) of naturally occurring isotopesof an atom are found in nature |
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atomic radii |
Size of the atom,measured from the nucleus to the outerelectron level |
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metallic character |
How strong thecharacteristics of a metal are present |
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non-metallic character |
How strong the characteristics of a nonmetal are present. Increasesdiagonally up and to the right |
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electron affinity |
A neutral atom’s likelihood of gaining an electron |
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ionization energy |
Amount of energy an atom must absorb to discharge an electron |
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alkai metals |
Most active metals Stored under oil 1+ oxidation number Because of their reactivity, alkali metals don’texist as free elements. All Group 1 metals react vigorously with water. |
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hydrogen |
Unique element, most abundant in the universe(75%) Nonmetal on the left side of the Periodic Table(found in metal column) Gas state One valence electron |
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halogens |
Most active nonmetals 1- oxidation number |
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noble gases |
Relatively inactive (inert) Contain 8 valence electrons All gases |