Transcript Periodic Arrangement

Periodic
Arrangement
The Periodic Table
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Created by Dimitiri Mendeleev in the 1860’s
Mendeleev noticed patterns in the
properties of different elements
Periodic Law
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The chemical and physical properties of
elements are because of their atomic
numbers.
Classification
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The Periodic table is
separated into
different categories.
The properties of the
elements determine
the placement on the
table
Vertical Columns
are called groups
Or families
Horizontal
rows are
called
Periods
Take out your handbook
Find the page
with the
periodic table
Label the
families
accordingly
Finding your way
l
6
6 66
C
Carbon
12.001
Atomic Number: number of
protons in the nucleus of
an atom
Chemical Symbol: letter(s)
used to represent a specific
element
Atomic Mass: the total number
of protons and neutrons in the
nucleus of an atom
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Locate the atomic number and symbol of
Barium?
What is the atomic mass of Iron?
Find the name of an element with a mass
of 258 an atomic number of 101.
Metals
* Found to the
left of the zigzag line
* Are solid at
room
temperature
•Good conductors
•Ductile (can be
Stretched)
•Malleable (can be
shaped)
•Shiny
Non-Metals
Right of zig-zag line
More than half are
gases at room
temperature
Brittle and dull
*Poor conductors
of electricity
Metalloids
Elements that border
the zig-zag line
Brittle
Have properties of
both metals and
non-metals
Semi-conductors
B, Si, Ge, As, Sb,
Te, Po, At