Describe the two different notations used to specify

Chemistry: A Molecular Approach | 3rd Edition | ISBN: 9780321809247 | Authors: Nivaldo J. Tro

Problem 18E Chapter 2

Chemistry: A Molecular Approach | 3rd Edition

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Chemistry: A Molecular Approach | 3rd Edition | ISBN: 9780321809247 | Authors: Nivaldo J. Tro

Chemistry: A Molecular Approach | 3rd Edition

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Problem 18E

Describe the two different notations used to specify isotopes and give an example of each.

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Solution : The above figure illustrates the Millikan’s oil-drop experiment, which was used to measure the charge of the el ectron. Small drops of oil were allowed to fall between electrically charged plates. The drops picked up extra electrons as a result of irradiation(process by which an object is exposed to radiation) by X-rays and they became negatively charged. M illikan measured the varying voltage between the plates that affected the rate of fall. From these data he calculated the negative charge on the drops. Because the charge on any drop was always some integral multiple of 1.602×10 C, Millikan -19 deduced this value to be the charge of a single electron. (a) What is the significance of the fact that the droplets carried different charges The fact that the d roplets carried different charges signifies that the d rops are of different sizes. This is explained in the data corresponding to the student's experiment which is as follows : From the table above , we see that different charges are carried out by different droplets. This is possible only when there is a difference in the size of the droplets. The size of the droplet is related to the ch arge carr ied by the droplet. S maller th e size of the droplet, l esser will be the harge ca rried by the d roplet. igger th size of the roplet, greater will be the c harge carried by the droplet. Hence, the difference in sizes of the droplets effects in difference of their charges. We will get the integer values of the charge calculated to get conclusion about the charge of the electron. To get the integer values, we divide each charge by the smallest charge given. Among the given charges, the smallest...

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Chapter 2, Problem 18E is Solved
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Textbook: Chemistry: A Molecular Approach
Edition: 3rd
Author: Nivaldo J. Tro
ISBN: 9780321809247

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