ATOMS & SPEED (Homework 2 to be worked but not turned
in)
(
Diameter= 0.5 to 2.5 x 10-8 cm (in scientific notation, which is “economical”)
Scientific notation General (expanded) notation)
1 x 10-8 cm = ____________________________
How many inches is 1 x 10-8 cm? (1in = 2.54cm; 0.394in = 1cm)
Mass proton= 1.672 x 10-24 g
electron= 9.108 x 10-28 g
“Mole”= 6.02 x 1023 atoms of an element.
The atomic weight expressed in grams of an element will contain a mole of atoms
Element Mass of 1 mole
Li _____________
Ru _____________
1 mole of Ru is how many ounces? (1 oz = 28.35 g; 1 g = 0.0353 oz)
Speed of Light (in vacuum)
General Scientific
186,000 mi/s = _______________________
_____________________ = 3 x 1010 cm/s