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Robert Millikan in 1909
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CoachMillikan's oil-drop experiment proved that charge is quantised, that charge can take up values which are integral multiples of the elementary charge e.
(e = 1.6 x 10-19 C)
Robert Milikan, and American scientist, created the Oil Drop Experiment which found the charge of electrons. These were found to have a negative charge. His experiment used a positive plate (on top) and a negative plate (below). He sprayed drops of oil (the oil drops have a neutral charge) into the container and let gravity bring them down to the negative plate. While the drops fell, Milikan hit them with rays of negative charge. When a drop was hit once, it would slowly rise towards the positive plate. When hit twice, it would quickly race to the top. Because the neutral drops were hit with a negative charge, opposites attract and they went to the positive plate. Drop that were shot twice moved faster because they had a stronger negative charge.
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What happens when 1 drop of bromine is added to vegetable oil?
When 1 drop of bromine is added to vegetable oil, a chemical reaction occurs where the bromine reacts with the unsaturated fats in the oil. This reaction causes the bromine to decolorize, turning from reddish-brown to colorless. This change is a test for the presence of unsaturated fats in the vegetable oil.
Millikans oil drop apparatus allowed for the determination of which property of the electron?
Millikan's oil drop apparatus allowed for the determination of the charge of the electron. By measuring the charges on oil droplets and manipulating electric fields, he was able to calculate the charge-to-mass ratio of the electron, which in turn helped determine the actual charge of the electron.
What happens when a drop of oil is stirred into a glass of water?
The oil will initially float on the surface of the water due to differences in density. Over time, the oil droplet may break into smaller droplets due to agitation, eventually dispersing throughout the water. However, oil and water do not mix because they are immiscible, so the oil droplets will not dissolve in the water.
Who discovered change of electron by oil droplet experiment?
Robert Millikan discovered the change of electron using the oil drop experiment in 1909. He was able to measure the charge of an electron accurately using this method.
Can essential oil's be put into an oil burner by themselves or do you dilute?
Essential oils can be put into an oil burner by themselves, but it's recommended to dilute them with water or a carrier oil to prevent irritation and ensure a lighter, more diffused scent. Diluting also helps the essential oil last longer in the burner.
