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Name the scientist who first measure the charge of an electron?
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∙ 11y ago
Robert Boyle
Wiki User
∙ 11y ago
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How does an electron become charged?
It doesn't really "become" charged. An electron is always charged, and it can only have a charge of -e where value of elementary charge e is 1.602 * 10-19 C as found first by Millikan with his famous oil drop experiment
Why the electrons have only negative charge why not positive charge?
There is a real force associated with the electron. This little guy has a "force field" standing around it at all times. All day, every day. It cannot be made to go away. This field of force has been given the name "electric" and it is an electric (force) field. We also give the designator "negative" to that field to identify its polarity. That's because the force field has "direction" associated with it. In sum, the electron has this field around it because it cannot "not" have it. The negative electric field of the electron is an intrinsic quality that cannot be separated from it. When an electron comes into existence, it appears with its negative charge, and that's what make it negative.
Who measured the charge on the electron?
Sir Joseph Thomson (J.J. Thomson) determined the charge of the electron in 1897, calling them "corpuscles." Previously electron beams had been referred to as Lenard rays and cathode rays.J.J. Thompson with his cathod ray tube experiment.
How can you use the science word electron in a sentence?
Example sentences for electron Clearly, both men were eager to resume doing what they do best, which is game plan down to the last electron. In order to understand what a particular electron is up to, one takes a sum of all of its possible histories. The electron source needs to be a metal, and the usual choice is aluminium. By 1911, scientists had already measured the charge and mass of an electron. The electron is one of the basic constituents of matter. The first step in atomic research was to recognize the existence of the outer electron shell and to study its laws. Scientists measure that electron accumulation by exposing the grains to light in a lab, releasing the particles. These ions then organize electron flows throughout the cell, bringing power to wherever it is needed. Hydrogen, the simplest atom, consists of a single proton encircled by a single electron. The transit of physical products does not match the ease of electron packets. We are navel gazing but with better electron microscopes. The more precisely you know an electron's position, the less precisely you know its momentum. When a positron encounters its regular opposite, an electron, both are destroyed in a shower of new particles. Sound impelled an electron in an energy well to a second energy well and back. The voltage across a discharge tube will accelerate a free electron up to some maximum kinetic energy. Enjoy!
What did Robert Millikan discover about the electron?
Born in Morrison, Illinois, Robert Andrew Millikan was the second son of the Reverend Silas Franklin Millikan and Mary Jane Andrews. When Millikan was seven, his family moved to Maquoketa, Iowa, where he attended high school. In 1886 he entered Oberlin College in Ohio. In 1887 he enrolled in several classics classes there, and because he did quite well in Greek, at the end of his sophomore year, he was asked to teach an introductory-level physics class. He enjoyed teaching physics and accepted a two-year teaching post at Oberlin upon graduation in 1891. It was during this period that he developed an even keener interest in physics.In 1893 Millikan began his doctoral work at Columbia University, receiving a Ph.D. in 1895. After travelling to Germany, he eventually accepted a faculty position at the University of Chicago. It was as a teacher and textbook author that Millikan first made his mark. He wrote or co-wrote a number of elementary physics texts that became the classics in this field. However, while valued activities, they did not lead to his promotion to full professor. Determined to ascend in academic rank, Millikan began his research into the charge on the electron.At the time, the debate over whether or not atoms were real had almost played out, but the questions surrounding the true nature of the electron were still unanswered. Although the work of the English physicist J. J. Thomson had elucidated the charge-to-mass ratio, determining that the electron had a discrete, fixed charge and mass remained.Being an experimentalist, Millikan used a tiny, submillimeter drop of oil suspended between capacitor plates to measure the incremental charge on an electron. His reasoned that the oil drop would pick up a charge due to friction as it entered the region between the plates. By ionizing the atmosphere and monitoring the motion of multiple drops, he was able to compare the time that the drop took to fall under the influence of gravity and with the electrical plates off, against the time that it took for the drop to climb under the influence of applied voltage . The interaction of the drop with the electric field always occurred in discrete units, indicating that the electron charge was a single value, and that it was the same value for all different forms of electricity.Millikan's oil-drop experiment settled the argument and determined accurately (within one part in a thousand) both the charge and, by virtue of the charge-to-mass ratio, the mass of the electron. Both numbers allowed the Danish physicist Niels Bohr to finally calculate Rydberg's constant and provided the first and most important proof of the new atomic theory .Millikan went on to demonstrate the photoelectron effect, providing a valuable proof of Albert Einstein's equations. His experiments also aided both Einstein and Bohr in their later research efforts. In 1923 he was awarded a Nobel Prize in physics for both his work in determining the charge on the electron and exploring the photoelectric effect.
What experiment did Millikan do?
Robert Millikan was the first to measure the electrical charge of an electron.
What was Robert Millikan?
Robert Millikan was the first Physicist to measure the electrical charge of the electron.
The scientist who first proposed the order of electron distribution within orbitals was who?
Friedrich Hermann Hund
Who determined the charge on a single electron?
the charge of either a single proton, or the absolute charge of a single electron is approximately 1.602176487(40)×10−19 coulombs .The magnitude of the elementary charge was first measured in Robert A. Millikan's noted oil drop experiment in 1909
Why there is big gap between first and second ionization energies?
Ionization energies are the amount of energy needed to remove an electron from an atom in the gaseous state, thereby giving the atom a positive charge and making it an ion. Ions get a +1 charge for each electron lost. It is this positive charge of the atom that makes the second ionization energy considerably greater than the first. Not only does the second electron have to overcome the initial attractive forces to nucleus, it must also overcome the extra +1 charge the atom has after the loss of the first electron, which simply takes more energy.
How did Millikans experiment change your view on atoms?
Millikan measured the first the electrical charge of an electron.
Why the scientist who made the first periodic table didn't understand why properties of elements repeated?
He didn't know about electron configuration.
Robert A. Millikans contributions to the atomic theory?
Robert A. Millikan was the first to determine the electrical charge of the electron.
In the first group of elements in the periodic table what does the first group have in common?
They all have one valence electron in their outer shells and so tend to lose that electron in chemical reactions, gaining a +1 charge.
Why does Be have a much larger second ionization energy than the first?
The energy to remove 1 electron is the first ionization energy. To remove a second electron requires more energy. This is because the electron being removed now has to overcome the +1 positive charge introduced after the 1st electron was removed.
What is formed when the first ionization energy is applied to an aton?
A positive ion with a single charge and a "free" electron are formed.
Would you expect the second electron gain enthalpy of O as positive more negative or less negative than the first Justify your answer?
The second electron gain of an oxygen atom would be expected to be less negative. The reason for this outcome is that the oxygen atom gaining a second electron already has one electron and thus a negative charge. This negative charge repels the second electron to some extent, making the enthalpy of this process less negative than when the first electron was added to the neutral oxygen atom.
