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Dalton’s Atomic Theory. The Scanning Tunneling Electron Microscope.

Published byDorthy Cameron Modified over 9 years ago

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Presentation on theme: "Dalton’s Atomic Theory. The Scanning Tunneling Electron Microscope."— Presentation transcript:

1 Dalton’s Atomic Theory

2 The Scanning Tunneling Electron Microscope

3 Particle Accelerator

4 The Cathode Ray Tube

5

6

7

8

9 The Plum Pudding Model

10 Ernest Rutherford

11 The Gold Foil Experiment

12

13 Rutherford’s Gold Foil

14 The Gold Foil Experiment

15 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 ( 10 X) has a relative abundance of 19.91%. The isotope with a mass of 11.009 amu ( 11 X) has a relative abundance of 80.09%. Calculate the average atomic mass of this element.

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