Transcript Introduction to the Periodic Table

Introduction to the
Periodic Table
Important Vocabulary
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Parts of an atom
* protons – positively charged particle in the
nucleus
* neutrons – neutral particle in the nucleus
* electrons – negatively charged particle that
surrounds the nucleus
Dmitri Mendeleev
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Given credit for designing original periodic table
of the elements
He arranged them in order of atomic mass
(number of protons and neutrons)
He saw that similar properties fell together
Henry Moseley
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He rearranged the table and put the elements in
order of atomic number (number of protons)
Reading the Periodic Table
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Atomic number – number of protons and
electrons (number at top of box)
Atomic mass – number of protons and neutrons
added together (number at bottom of box)
Organization of the Periodic Table
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Periods (rows) – increased left to right in
increasing atomic number and mass
Groups/Families (columns) – elements that
share common characteristics
Metals, nonmetals, and
metalloids
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Using pages 244-245, make a three column chart
in your notes that identifies characteristics of the
three classifications of elements listed above. Be
sure to use the pictures on those pages for
information in addition to the text.
Metals, metalloids, nonmetals
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Make a three column chart using labels above.
Use pages 244-245 to put the following characteristics
in the correct column. They will only fit in one place.
Malleable and ductile
Good conductors
Poor conductors
Dull or shiny
Brittle and somewhat ductile
Always shiny
Also called semiconductors
Always dull
Not malleable or ductile