Ch.2 - Atoms & ElementsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

In this experiment Robert Millikan and Harvey Fletcher discovered the charge of an electron. 

Millikan's Oil Drop Experiment 

Concept #1: Millikan Oil Drop Experiment

Concept #2: Millikan Oil Drop Experiment

Additional Problems
A chemist in an imaginary universe, where electrons have a different charge than they do in our universe, performs the Millikan oil drop experiment to measure the electron's charge. The charges of several drops are recorded below. What is the charge of the electron in this imaginary universe?
An α particle,  4H2+, has a mass of 4.00151 amu. Find the value of its charge-to-mass ratio in C/kg.  
What significant information about atomic structure came from the Milikan experiment using charged oil drops? (A) Millikan showed that cathode rays were identical to a stream of electrons coming from an atom. (B) Millikan confirmed that the neutron and proton were about the same mass. (C) Millikan determined that magnitude of the charge on an electron. (D) Millikan proved that the mass of an atom was concentrated in nucleus.
What do Thomson’s investigation of cathode rays, Millikan’s oil-drop experiment, and Rutherford’s investigation of alpha, beta, and gamma radiation have in common?   a) Use of electrically charged plates b) Use of radioactive sources c) Direct observation of sub-atomic particles d) Investigation of the nucleus e) Each experiment is a scientific law
The mass of an electron was determined by which of the following famous experiments?  A. Millikan's oil drop experiment B. Thomson's cathode ray tube experiment C. The discovery of radioactive emissions by Rutherford D. Rutherford's gold foil experiment  E. First Law of Thermodynamics 
. Millikan’s oil-drop experiment to measure the charge of the electron. Small drops of oil are allowed to fall between electrically charged plates. Millikan measured how varying the voltage between the plates 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 10-19C, Millikan deduced this value to be the charge of a single electron.Are the masses of the oil drops changed significantly when electrons accumulate on them?
In an alternate universe, the smallest negatively charged particle, analogous to our electron, is called a blorvek. To determine the charge on a single blorvek, an experiment like Millikans with charged oil droplets was carried out and the following results were recorded: Droplet Number Charge (C) 1 7.74 10-16 2 4.42 10-16 3 2.21 10-16 4 4.98 10-16 5 6.64 10-16 Based on these observations, what is the largest possible value for the charge on a blorvek?
In an alternate universe, the smallest negatively charged particle, analogous to our electron, is called a blorvek. To determine the charge on a single blorvek, an experiment like Millikans with charged oil droplets was carried out and the following results were recorded: Droplet Number Charge (C) 1 7.74 10-16 2 4.42 10-16 3 2.21 10-16 4 4.98 10-16 5 6.64 10-16 Further experiments found a droplet with a charge of 5.8110-16 C. Does this new result change your answer to part A?
In an alternate universe, the smallest negatively charged particle, analogous to our electron, is called a blorvek. To determine the charge on a single blorvek, an experiment like Millikans with charged oil droplets was carried out and the following results were recorded: Droplet Number Charge (C) 1 7.74 10-16 2 4.42 10-16 3 2.21 10-16 4 4.98 10-16 5 6.64 10-16 What is the new largest value for the blorveks charge?
In the Millikan oil-drop experiment (see the figure) the tiny oil drops are observed through the viewing lens as rising, stationary, or falling, as shown here. What causes their rate of fall to vary from their rate in the absence of an electric field?
In the Millikan oil-drop experiment (see the figure) the tiny oil drops are observed through the viewing lens as rising, stationary, or falling, as shown here. Why do some drops move upward?
Imagine a unit of charge called the zorg. A chemist performs the oil drop experiment and measures the charge of each drop in zorgs. You may want to reference (Pages 44 - 74) Chapter 2 while completing this problem.Based on the results listed here, what is the charge of the electron in zorgs (z)? Drop # Charge (z) A -4.510-9 B -9.010-9 C -6.010-9 D -12.010-9
Suppose that one of Millikan’s oil drops has a charge of -4.810-19 C.How many excess electrons does the drop contain?
You may want to reference (Pages 44 - 74) Chapter 2 while completing this problem.How many electrons are necessary to produce a charge of -1.0 C ?
Explain Millikans oil drop experiment and how it led to the measurement of the electrons charge.
Why is the magnitude of the charge of the electron so important?
Give the basic properties (mass and charge) of the electron.
A chemist in an imaginary universe, where electrons have a different charge than they do in our universe, performs the Millikan oil drop experiment to measure the electrons charge. The charges of several drops are recorded below. What is the charge of the electron in this imaginary universe? Drop # Charge A -6.6 10-19 C B -8.8 10-19 C C -11.0 10-19 C D -4.4 10-19 C
On a dry day, your body can accumulate static charge from walking across a carpet or from brushing your hair.What is their collective mass?
What property was measured in Millikans oil drop experiment?
Which of the following charges is NOT possible for the overall charge on an oil droplet in Millikans experiment? For this problem well round the currently accepted charge of an electron to 1.602 C.
Answer the following questions:What is the charge, in units of the electronic charge, of electron?
In an experiment it was found that the total charge on an oil drop was 5.93 x 10 –18 C. How many negative charges does the drop contain?
Thomson was able to determine the mass/charge ratio of the electron but not its mass. How did Millikan’s experiment allow determination of the electron’s mass?
The following charges on individual oil droplets were obtained during an experiment similar to Millikan’s: −3.204×10−19 C; −4.806×10−19 C; −8.010×10−19 C; −1.442×10−18 C. Determine a charge for the electron (in C, coulombs), and explain your answer.
In an experiment it was found that the total charge on an oil drop was 5.93 x 10-18 C. How many negative charges does the drop contain?
A chemist in a galaxy far, far away performed the Millikan oil drop experiment and got the following results for the charges on various drops. Use these data to calculate the charge of the electron in zirkombs.2.56 x 10-12 zirkombs                                  7.68 x 10 -12 zirkombs3.84 x 10-12 zirkombs                                  6.40 x 10 -13 zirkombs