Chem: Chemistry in Context (Exam 2)

*ozone *atomic structure *Lewis structure *Waves *Radiation  *CFC's 

65 cards   |   Total Attempts: 184
  

Cards In This Set

Front Back
Dobson unit
*DU *corresponds to about one ozone molecule for every billion molecules & atoms present in the air
Ozone (word roots)
*Greek *to smell
Allotropes
2+ forms of the same element that differ in their chemical structure & properties *Ex: O2 * O3
Ozone layer
Stratsospheric region of maximum ozone concentration
Nucleus
*subatomic structure *minuscule & highly dense region composed of protons & neutrons
Protons
Positively charged subatomic particles
Neutrons
Electrically neutral subatomic particles, but have almost exactly the same mass as protons
Electron
*much smaller mass than a proton or neutron *negative charge equal in magnitude to that of the proton, but opposite in sign
Atomic number
Number of protons in an atom of that element
Periodic properties
Vary in a regular way w. increasing atomic number & repeat at regular intervals
Valence electrons
Found in highest energy level & help account for many of the observed trends in chemical properties
Find # of electrons in representative elements rule 1
*max # in orbit = 2n² *n= number of orbits counting from nucleus
Find # of electrons in representative elements Rule 2
# of valence electrons equals group # for representative elements
# of electrons in representative elements restrictions
*max possible electrons in orbit 1>> 2 *max possible electrons in 2nd outermost orbit >> 18 *max possible electrons valence electrons >> 8
Isotopes
2+ forms of the same element (same # of protons) whose atoms differ in # of neutrons & hence in mass