Transcript Understanding the Periodic Table

Understanding the
Periodic Table of
Elements
Left of the “Staircase” are metals:
Properties
of metals
are:
Left of the
staircase
Luster - Shiny
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Malleable- Can be hammered
into a thin sheet
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DuctileCan be stretched into wire
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Good conductors of
electricity and heat
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Higher density
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High melting point
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Right side of the staircase are nonmetals
Properties
of nonmetals are:
Right of the
staircase
No luster - Dull
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Brittle
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Bad conductors of
heat and
electricity
Low density
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Low melting point
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Metalloids are along the
staircase
Properties of
both metals and
non metals
Can be
shiny or dull
Solid
Draw a metal and a
nonmetal
Label it with one of
the characteristics
Pg 93
How to read
the periodic
table
Dmitri
MendeleevRussian
chemist who
designed the
periodic
table of
elements
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Periods-
Horizontal
rows
Elements in a
period have
similar mass,
but different
properties
Groups or Families-
vertical columns
Elements in the
same family have
similar
characteristics
and the same
number of
valence electrons
Some
families have
their own
names
Alkali Metals
First family
Very reactive
because of
only 1 valence
electron
Hydrogen
Lithium
Alkaline Metals
Second
family
2 valence
electrons
Beryllium
Magnesium
Halogens
Second to
last family
Very
reactive
Noble gasses
Don’t react
with any other
elements
Full outer shell
Helium
Neon