Chem 161-2010 Lecture 3

Chem 161-2010 Lecture 3 - CHEMISTRY 161-2010 LECTURE 3...

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CHEMISTRY 161-2010 LECTURE 3 ANNOUNCEMENTS E-MAIL Don’t let your mailboxes get full. QUIZ/EXAM/WORKSHEET MISCELLANEOUS Bring copy of notes to class Review notes before coming to class. Extra problems  Look for 2007, 2008 and 2009 exams on Sakai; then, soon, look for  the detailed solutions to those problems. Other Chem 161-2010 Lecture 3 1
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PLAN FOR TODAY : COMPLETE TUESDAY’S LECTURE ON THE PERIODIC TABLE AND NOMENCLATURE. THEN CONTINUE NOMENCLATURE. • NOMENCLATURE Alkali and Alkali Earth metals Transition metals Non-metals Acids ORGANIC COMPOUNDS Chem 161-2010 Lecture 3 2
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Chem 161-2010 Lecture 3 3
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Organizing the Elements Some scientists attempted to organize the elements in a table according to mass. Others organized the elements into a table according to properties. In 1869 Dmitri Mendeleev developed a table where the elements were organized by a combination of mass and properties. There were some reversals in mass (e.g., Te (127.6) before I (126.9)). Mendeleev didn’t realize it, but he was organizing the table according to atomic number (number of protons). This is the precursor to today’s periodic table. Chem 161-2010 Lecture 3 4
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Types of elements Metals - Left and middle of periodic table Malleable Ductile Lustrous Conducts electricity Almost all solids Non-metals - Right side of the periodic table - Solids, liquids and gases at room temperature - Electrical insulators Metalloids - Diagonal band separating metals from non-metals - Properties between metals and non-metals - Semiconductors Chem 161-2010 Lecture 3 5
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NOMENCLATURE PERIODIC TABLE TYPE II 1A 2A 3A 4A 5A 6A 7A 8A H + He Li + Be 2+ B C N O F Ne Na + Mg 2+ 3B 4B 5B 6B 7B 8B 8B 8B 1B 2B Al 3+ Si P S Cl Ar K + Ca 2+ Sc Ti V Cr Mn Fe Co Ni Cu Zn 2+ Ga 2+ Ge As Se Br Kr Rb + Sr 2+ Y Zr Nb Mo Te Ru Rh Pd Ag + Cd 2+ In Sn Sb Te I Xe Cs + Ba 2+ La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn MONOATOMIC ANIONS H - N 3- O 2- F - S 2- Cl - Br - Chem 161-2010 Lecture 3 6 Type I Alkali and alkali earth metals [Formula] Ionic Compounds Transition metals [Formula] Ionic compounds Type III Non-metals & metalloids Molecular Covalent Compounds ET: Define cation and anion. A cation is an atom that lost an electron; an anion is an atom that gained an electron; now they are both ions, not atoms.
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