Descriptive Inorganic Chemistry Chem 241 12-1 M, W, F Bill Vining 232 Physical Sciences Building 436-2698 viningwj@oneonta.edu

Inorganic Chemistry One of the three descriptive chemistries: Biochemistry Inorganic Chemistry Theoretical and Practical Chemistries: Physical Chemistry Analytical Chemistry

Inorganic Chemistry: Chemistry for the rest of the elements.

Inorganic Chemistry Transition metal chemistry: Metal-ligand complexes Main group and metal-based materials science

Descriptive Inorganic Chemistry Chapter 2: Figure 2.2 © 2009 W.H. Freeman

First Assignment: Find the best periodic table website. Bring URL and list of why you think it is the best (and any drawbacks). Hand in paper at start of class Friday.

Official Stuff Course Website: http://employees.oneonta.edu/viningwj/chem241/ Text: Descriptive Inorganic Chemistry, 5th Ed., Rayner-Canham and Overton Grading: Three exams 300 points Homework/In-Class Quizes 100 points Project 100 points Homework: some OWL Starting Next Week + hand in

First Topic Where do all these elements come from? How are they made?

Descriptive Inorganic Chemistry Chapter 2: Figure 2.6 © 2009 W.H. Freeman

What aspects of this should we explain?

What will our explanations depend on? Thermodynamics: relative stability Kinetics: rate and mechanism

General Decrease in Abundance with Atomic Number

Even > Odd

Peak at Fe

Peak at Pb

Trough at Be

Missing Tc and Pm and Above N = 83

Nuclear equations

Nucleosynthesis of the Elements Why does this happen only in stars? Hydrogen Burning 1H + 1H  2H + e+ + ve­ 2H + 1H  3He +  3He + 3He  4He +21H 41H  4He + 2e+ + 2ve

Helium Burning 4He +4He  8Be 8Be + 4He  12C*  12C +  Is this easier or harder than hydrogen burning?

Carbon Burning, etc. 12C + 4He  16O +  16O + 4He  20Ne +  20Ne + 4He  24Mg +  12C + 12C  24Mg +  12C + 12C  23Na + 1H 12C + 12C  20Ne + 4He Go back to initial Questions. Can we answer any?

The -Process 20Ne +   16O + 4He 20Ne + 4He  24Mg +  2 20Ne  16O + 24Mg +  40Ca + 4He  44Ti* +  44Ti* + e-  44Sc* + v+ 44Sc*  44Ca + + + v+ 44Ca + 4He  48Ti + 

Neutron Capture-Beta Decay