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29 Cards in this Set
- Front
- Back
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credited for organizing elements
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Mendeleev
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elements in the same group have the same number of
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valence electrons
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elements in the same _____ are most chemically similar
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group
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group 1 elements are called
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Alkali Metals
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group 2 elements are called
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alkaline earth metals
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groups 3-12 elements are called
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transition elements
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these elements form colorful compounds
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transition elements
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these elements are all metals with few valence electrons
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transition elements
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the periodic table elements are organized based on
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atomic number
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The only element that is a liquid at STp
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Br
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These elements are gases at STP
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H, He, N, O, F, Cl, Ne, Ar, Kr, Xe, Rn
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group 17 elements are called
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halogens
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only group with all 3 phases
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halogens, group 17
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group 18 elements are called
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noble gases
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the elements of these groups are so active that cannot be found in their free state in nature, but can be separated by electrolysis
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1, 2, and 17
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the elements of this group don't occure with other elements naturally
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group 18
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periods all have the same
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number of principle energy levels
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these elements are semi-metals or metalloidds
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B, Si, As, Te, At, Ge, Sb
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electronegativity
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ability to attract electrons
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electronegativity _________ from left to right
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increases
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ionization energy
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amt energy required to remove outermost electron shell
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ionization energy ________ from left to right
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increases
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atomic radius
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difference from nucleus to last energy shell
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atomic radious _______ from left to right
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decreases
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Arrange from smallest to largest:
Rb, Rb +1, I, I -1 |
I, I -1, Rb +1, Rb
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more metallic means
more nonmetallic means |
gains electrons more easily
loses electrons more easily (higher electronegativity) |
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periods 6 and 7 are what and do what?
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the lanthamoid and actinoid series
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new elements end in ___
1- 2- 3- 4- 5- 6- 7- 8- 9- |
ium
un bi tri quad pent hex sept oct ehn nil |
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these three elements will react with F+O in a laboratory
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Kr, X, Rh
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