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

Chapter 6 Developing The Periodic Table

Each element has its own symbol that begins with a capital letter. Any other letters in the symbol are lower case.

Latin Names ElementSymbolLatin Name SodiumNaNatrium CopperCuCuprum GoldAuAurum IronFeFerrum SilverAgArgentum

Lead (Pb) “The Metal That Destroyed Rome” According to some toxicologists “Lead poisoning contributed to the fall of Rome,”

Lead (Pb) Z = 82 Plumbum (Pb)Plumber

The Lost Franklin Expedition

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.

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.

Gallipoli

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 loss—for 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.

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 and became an officer in the signal corps. At the time of his death, he was the most promising physicist of his time.

“Ein schwerer Verlust” “A heavy loss”

Metals, Nonmetals, Metalloids The periodic table can be used to determine the metallic/nonmetallic nature of an element.

Metals, Nonmetals, Metalloids

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.