periodic table notes - weebly
TRANSCRIPT
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The Periodic Table
Comes around once every period!
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The Periodic Table
Column = Group or Family
18 columns on the Periodic Table
Row = Period
7 rows on the Periodic Table
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
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The Father of the Periodic TableDimitri Mendeleev
1869 - The first periodic table was created by Dimitri Mendeleev.
Called the father of the periodic tableArranged his periodic table by atomic
mass.
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Mendeleev’s Periodic Table
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The (Modern) Periodic Table
Moseley discovered that the periodic table
of the elements was better organized
using atomic number, not atomic mass.
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Why use the Periodic Table?
Quick Reference – Look up information
about any element quickly in one easy-to-
see place.
Predictions - That properties of unknown
elements are accurately predicted by
using the properties of elements around
the missing element.
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Unknown Elements?
?
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Organization Tips
Read from left to right across a row, the
atomic # increases.
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Organization Tips
All elements in a column have similar chemical reactivity. Ex: Sodium in group 1 reacts violently to
water, and so do Lithium and all other elements in group 1.
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Organization
Elements in the same column also have
the same number of valence electrons
EXCEPTION = transition metals.
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Organization
All elements in the same ROW (period)
have the same number of orbitals.
As the row number increases, the number of
orbitals (shells) increases.
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Solids/ Liquids/ Gasses (at STP*)
Green = Solid Blue = liquid Yellow = Gas
*STP = Standard Temperature and Pressure (basically the conditions you’re sitting in now).
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S/L/G Insight
Majority of the periodic table is solid at
room temperature.
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Types of Matter:
Metals / Metalloids/ Non-metals
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Types of Matter
Most elements are metals (~88)
The next-most are non-metals (~17)
The fewest number of elements are
metalloids (~7)
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Metalloids
(aka semi-conductors/semi-metals)
Elements that have properties of
both a metal and a non-metal.
Also called semi-conductors/
semi-metals.
Semi-conductors = conduct heat
and electricity, but not as well as
metals
Semi-metals = kind of like a metal