dalton’s atomic theory. the scanning tunneling electron microscope
TRANSCRIPT
Dalton’s Atomic Theory
The Scanning Tunneling Electron Microscope
Particle Accelerator
The Cathode Ray Tube
The Plum Pudding Model
Ernest Rutherford
The Gold Foil Experiment
The Gold Foil Experiment
Rutherford’s Gold Foil
The Gold Foil Experiment
Relative Abundance
• On earth, 99.759% of all naturally occurring oxygen is oxygen-16. Two other oxygen isotopes are found in small amounts: oxygen-17 (0.037%) and oxygen-18 (0.204%). Find the average atomic mass of oxygen.
• Element X has two natural isotopes. The isotope with a mass of 10.012 amu (10X) has a relative abundance of 19.91%. The isotope with a mass of 11.009 amu (11X) has a relative abundance of 80.09%. Calculate the average atomic mass of this element.