Common Prefixes

z
zepto
10E-21
a
atto
10E-18
f
femto
10E-15
p
pico
10E-12
n
nano
10E-9
greek letter mu
micro
10E-6
m
milli
10E-3
c
centi
10E-2
d
deci
10E-1
da
deca
10E+1
k
kilo
10E+3
M
mega
10E+6
G
giga
10E+9
T
tera
10E+12

To illustrate how wide a range these prefixes are numerically, Nanotechnology encompasses matter on the scale of 1 to 100 nanometers, while large scale objects like the diameter of the sun (1.4Gm) or planetary distances, are measure in Gigameters.

MUST KNOW PHYSICAL CHEMISTRY TERMS

  • VSEPR theory - states that electrons in the valence shell orient themselves to maximize their separation around an atom.where regions of high electron density are represented as bonds.
  • diathermic - thermally conducting
  • adiabatic - thermally insulating
  • open system - matter can be transferred between the system and its surroundings
  • closed system - matter cannot pass between the system and surroundings
  • isolated system - a closed system with no thermal or mechanical contact with surroundings