Geology 109, General Oceanography
Spring 1996, Learning Community Section
Unit1, Topic 2, Matter and Atomic Structure


Chemistry is the Study of -----> Matter

Matter (that which takes up space and has mass)

Where did Matter Come From?


Matter comes in two forms:

Substances and Mixtures

American Chemical Society Computer Data Bank has over 4 million entries......

  • 3,400 pesticides
  • 3,400 cosmetic ingredients
  • 1,800 drugs
  • 8,600 food additives


Substances come in two types:

Elements and Compounds

Elements

around 90 are naturally occurring, rest of those on a Periodic Chart are man-made

(those above 92 or U for Uranium)

Character --- unable to easily separate into simpler particles of matter, and each element has unique physical properties.

  • Basic Unit -- the Atom

  • Example #1, What are the general characteristics of Sodium (Na) ?

Another Periodic Chart to explore…..

A look at the The Chemistry of Carbon


Compounds

the vast majority of the ACS's computer listing (the 4 million plus)

Character -- combinations of 2 or more elements, having physical properties different than the properties of the combining elements

Basic Unit -- the Molecule


Elementary Atomic Structure

Fundamental Particles
proton(s)
neutron(s)
electron(s)

Three Important Properties of These Particles

Charge
positive, neutral, or negative
Mass
Measured in Atomic Mass Units (AMU's)
Space
in nucleus
in orbits outside nucleus

Visualizing Atomic Orbitals (interesting look at the chemist's view but WAY beyond our basic orbital model of an atom!)


Proton(s)
Carry a positive charge
Weigh 1 A.M.U
Found in nucleus

Neutron(s)
* Carry a neutral charge
* Weigh 1 A.M.U
* Found in nucleus


Electron(s)
Carry a negative charge
in orbits outside nucleus
"essentially" nothing



A Summary Chart of Properties (which will not look good in lynx)
Particles protonsneutrons electrons
Charge positiveneutralnegative
Mass1 A.M.U 1 A.M.Uessentially nothing
Space
in nucleusin nucleus in orbits outside nucleus

Chemical Resource Pages

Umeň University, Umeň, Sweden

On to Molecules and Chemical Bonding


Jim Locke, College of Marin c/o jim@marin.cc.ca.us