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science 3rd
periodic table
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Cards (20)
Johan Wolfgang Dobereiner
German chemist
who formed the triads of elements with
similar
properties
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John Newlands
English chemist who proposed the
Law of Octaves
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Julius Lothar
Meyer
German
chemist who arranged the elements in order of
increasing
atomic mass
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Dmitri Ivanovich
Mendeleev
Russian
chemist who arranged the elements in order of increasing
atomic
mass
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Henry Moseley
English physicist who found that the
frequencies
emitted by elements follows the ordering of the elements by
atomic number
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Modern Periodic Table Law states that the
properties
of elements vary periodically with
atomic
number
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Groups
Vertical
columns of the periodic table, identify the principal families of elements (
18
groups)
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Periods
Horizontal
rows of the
periodic
table
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Main Group of Representative Elements
Elements from
taller columns
(Groups 1,2 and
13-18
)
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Group 1 or Family IA
Alkali metals
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Group 2 or Family A
Alkaline earth metals
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Group 13
Boron
Group
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Group 14
Carbon
Group
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Group
15
Nitrogen
Group
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Group 16
Oxygen
Group
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Group 17 or Family VIIA
Halogens
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Group
18
Noble or
Inert
gases
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Transition Metals
Group
3
to
12
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Special series of Elements
Lanthanides
- "
rare-earth metals
"
Actinides -
radioactive elements
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Classification of Elements
Metals
- left side
Non-metals
- right side
Semimetals
or
Metalloids
- zigzag line
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