the periodic table - ncc-1701-d falcon science...
TRANSCRIPT
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The Periodic Table
Unit II—Part 4
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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 Table—Dimitri Mendeleev
The first periodic table was created by Demitri Mendeleev.
Called the father of the periodic tableArranged his periodic table by atomic
mass.
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The father of the periodic table
That properties of unknown elements
could be predicted by the properties of
elements around the missing element
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Unknown Elements?
?
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The Current Periodic Table
Later the scientist Moseley discovered that
the periodic table of the elements was
better organized using atomic number, not
atomic mass
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The Periodic Table
As you read from left to right across a row,
the atomic # increases.
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Families on the Periodic Table Elements on the periodic table can be
grouped into families bases on their
chemical properties.
Each family has a specific name.
Elements in each
family react differently
with other elements.
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Solids/ Liquids/ Gasses
Green = Solid Yellow = Gas Blue = liquid
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Periodic Table information
The majority of the periodic table is solid at
room temperature.
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Metals / Metalloids/ Non-metals
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MetalloidsElements that can have
properties of both a metal and a
non-metal.
Also called semi-metals.
Semi-conductors (they can conduct
heat and electricity but not as well
as metals)
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HYDROGEN
Is apart of NO FAMILY on the
periodic table.
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ALKALI METALS
Group 1 – LIGHT BLUE
1 electron in the valence
shell
Very reactive, esp. with
water
Conduct electricity
Image: http://www.learner.org/interactives/periodic/groups2.html
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ALKALINE EARTH METALSGroup 2 – LIGHT
GREEN
2 electrons in the
outer shell.
Reactive, but less
than Alkali metals
Conduct electricity
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TRANSITION METALSGroups 3-12
DARK BLUE
Good conductors of
heat and electricity.
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BORON FAMILY
Group 13 - RED
3 valence
electrons
Most are
metals
Boron is a
metalloid
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CARBON FAMILY
Group 14 -
YELLOW
4 valence
electrons
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NITROGEN FAMILY Group 15 – DARK
GREEN
5 valence
electrons
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OXYGEN FAMILY
Group 16 -
PURPLE
6 valence
electrons
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HalogensGroup 17 -
ORANGE
7 valence
electrons
All are non-
metals
Very reactive
are often bonded
with elements
from Group 1
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Noble GasesGroup 18 - RED
STRIPES
Exist as gases
Non-metals
8 valence electrons = HAPPY!
Helium (He) has only 2 electrons in the outer shell = HAPPY!
Not reactive with other elements
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Rare Earth Metals
Some are
Radioactive
Conduct
electricity
LANTHANIDE
SERIES - PINKACTINIDE SERIES
- BROWN
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The Periodic Table
All elements in a column have similar chemical reactivity. Ex: If Sodium in group 1 is flammable when
touching water, so does Lithium and all other elements in group 1.
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The Periodic Table
Elements in the same column also have
the same number of valence electrons
Exception to this rule being the transition
metals.
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The Periodic Table
All elements in the same ROW (period)
have the same number of orbitals needed
to hold each elements electrons.
As the row number increases, the number of
orbitals (shells) needed increases.