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I II III The Periodic Table I. History

IIIIII The Periodic Table I. History. A. Mendeleev zDmitri Mendeleev (1869, Russian) 1.Organized elements by increasing atomic mass. 2.Elements with similar

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Page 1: IIIIII The Periodic Table I. History. A. Mendeleev zDmitri Mendeleev (1869, Russian) 1.Organized elements by increasing atomic mass. 2.Elements with similar

I II III

The Periodic Table

I. History

Page 2: IIIIII The Periodic Table I. History. A. Mendeleev zDmitri Mendeleev (1869, Russian) 1.Organized elements by increasing atomic mass. 2.Elements with similar

A. Mendeleev

Dmitri Mendeleev (1869, Russian)

1. Organized elements by increasing atomic mass.

2. Elements with similar properties were grouped together.

Page 3: IIIIII The Periodic Table I. History. A. Mendeleev zDmitri Mendeleev (1869, Russian) 1.Organized elements by increasing atomic mass. 2.Elements with similar

A. Mendeleev

3. Predicted properties of undiscovered elements.

There were some discrepancies.

Page 4: IIIIII The Periodic Table I. History. A. Mendeleev zDmitri Mendeleev (1869, Russian) 1.Organized elements by increasing atomic mass. 2.Elements with similar

B. Moseley

Henry Mosely (1913, British)

1. Organized elements by increasing atomic number.

2. Resolved discrepancies in Mendeleev’s arrangement.

Properties of Te & I were different from other elements in the column in Mendeleev’s table

They “fit” when arranged by atomic number.

Page 5: IIIIII The Periodic Table I. History. A. Mendeleev zDmitri Mendeleev (1869, Russian) 1.Organized elements by increasing atomic mass. 2.Elements with similar

Periodic Law

When elements are arranged in order of

increasing atomic #, elements with similar

properties appear at regular intervals.

Page 6: IIIIII The Periodic Table I. History. A. Mendeleev zDmitri Mendeleev (1869, Russian) 1.Organized elements by increasing atomic mass. 2.Elements with similar

Families of Elements

Similar valence e- within a group result in

similar chemical properties

ss11

ss22

ss22pp66

ss22pp55ss22pp44

s2p1ss22pp22

ss22pp33

End in dEnd in dxx

Page 7: IIIIII The Periodic Table I. History. A. Mendeleev zDmitri Mendeleev (1869, Russian) 1.Organized elements by increasing atomic mass. 2.Elements with similar

Families of Elements

Alkali MetalsAlkaline Earth MetalsTransition MetalsHalogensNoble Gases

Lanthanides (57-70)Actinides (89-102)

http://video.google.com/videoplay?docid=-2134266654801392897&q=alkali+metals

Page 8: IIIIII The Periodic Table I. History. A. Mendeleev zDmitri Mendeleev (1869, Russian) 1.Organized elements by increasing atomic mass. 2.Elements with similar

I II III

Organization of theElements

Quick Review

Page 9: IIIIII The Periodic Table I. History. A. Mendeleev zDmitri Mendeleev (1869, Russian) 1.Organized elements by increasing atomic mass. 2.Elements with similar

MetalsNonmetalsMetalloids

Metallic Character

Page 10: IIIIII The Periodic Table I. History. A. Mendeleev zDmitri Mendeleev (1869, Russian) 1.Organized elements by increasing atomic mass. 2.Elements with similar

Main Group ElementsTransition MetalsInner Transition Metals

Blocks

Page 11: IIIIII The Periodic Table I. History. A. Mendeleev zDmitri Mendeleev (1869, Russian) 1.Organized elements by increasing atomic mass. 2.Elements with similar

Blocks

A.k.a.

“Families”

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