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29 Cards in this Set

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