Play the video

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• Play the video Element Song.
• Put on repeat function and play while students
  are entering the class.

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Chapter 6

• Developing The Periodic Table

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Each element has its own symbol that begins with
a capital letter. Any other letters in the
symbol are lower case.
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Latin Names
Element Symbol Latin Name
Sodium Na Natrium
Copper Cu Cuprum
Gold Au Aurum
Iron Fe Ferrum
Silver Ag Argentum
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Lead (Pb)The Metal That Destroyed Rome

• According to some toxicologists Lead poisoning
  contributed to the fall of Rome,

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Lead (Pb) Z 82

• Plumbum (Pb)

• Plumber

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The Lost Franklin Expedition
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Its New, Its Canned, Its Poisoned
This old tin can was full of potatoes and was
part of the food supply on Sir John Franklin's
ships. Many of these tin cans, discarded by the
sailors, have been found on Beechey Island. In
those days, cans were just starting to be used as
a means of preserving food. People did not
understand that the lead from the solder seam
would give a person lead poisoning and could kill
them. It is believed that many of the men of the
Franklin Expedition died in this way.
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Mendeleev

• In 1869, Dmitri Mendeléev created the first
  version of the periodic table.
• He arranged the elements in order of increasing
  atomic mass and grouped them by similarity of
  properties.
• This allowed him to predict the properties of new
  elements.

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Henry Moseley

• Developed method of measuring the atomic number
  of elements.

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Henry Moseley

• Developed method of measuring the atomic number
  of elements.
• The Modern Periodic Table is organized by
  increasing atomic number.
• Predicted the existence of elements 43, 61, 72,
  and 75.

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Gallipoli
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Moseley

• At the age of 27, having volunteered to serve in
  the British Army in WWI, Moseley was killed by a
  sniper.
• When WWI started, he volunteered for active duty
  and became an officer in the signal corps. At the
  time of his death, he was the most promising
  physicist of his time. Even a newspaper in
  Germany (the enemy of Britain in the war) printed
  the headline Ein schwerer Verlust (A heavy
  lossfor science) when he died in Gallipoli.
• It is speculated that because of Moseley's death
  in the War that the British and other world
  governments began a policy of no longer allowing
  their scientists to enlist for combat.
• Many speculated that he should have won the Nobel
  Prize, but was unable to because it is only
  awarded to the living.

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Moseley

• At the age of 27, having volunteered to serve in
  the British Army in WWI, Moseley was killed by a
  sniper at Gallipoli.
• When WWI started, he volunteered for active duty.
  At the time of his death, he was the most
  promising physicist of his time.

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Ein schwerer Verlust

• A heavy loss

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Metals, Nonmetals, Metalloids

• The periodic table can be used to determine the
  metallic/nonmetallic nature of an element.

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Metals, Nonmetals, Metalloids
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Groups and Periods

• The vertical columns in the periodic table are
  called groups.
• Rows in the periodic table are termed periods.
• Elements with similar properties within the
  periodic table are grouped into a family.