Charged Aluminum Spheres: Determining Number of Electrons

In summary, charged aluminum spheres are small, spherical objects made of aluminum that have been electrically charged through contact with a charged object or by other means. They can be created by rubbing a non-conductive material, such as plastic, with a cloth and then touching the aluminum spheres with the charged material. These spheres have a high charge to mass ratio and tend to repel each other due to their like charges. They are commonly used in experiments to demonstrate electrostatic principles and in electrophoresis. In a vacuum, they will continue to repel each other, but in a non-vacuum environment, air resistance may cause them to neutralize their charges.
  • #1
Badger
28
0
[SOLVED] Charged Aluminum Spheres

Homework Statement


Two small aluminum spheres, each of mass 0.0250 kilograms, are separated by 80.0 centimeters.

How many electrons does each sphere contain? (The atomic mass of aluminum is 26.982 grams per mole, and its atomic number is 13.)

Homework Equations


Conversions from a chemistry course so long ago...

The Attempt at a Solution


.0250 kg * (1000g/1kg) = 25.0 g * (1 mole/26.982g) = .927 mole * (13 e- / mol) = 12 e-
 
Physics news on Phys.org
  • #2
13 electrons/atom... not 13 electrons/mole.
 
  • #3
Nevermind, figured it out. ;)
 
Last edited:

Related to Charged Aluminum Spheres: Determining Number of Electrons

What are charged aluminum spheres?

Charged aluminum spheres are small, spherical objects made of aluminum that have been electrically charged through contact with a charged object or by other means.

How are charged aluminum spheres created?

Charged aluminum spheres can be created by rubbing a non-conductive material, such as plastic, with a cloth to create a static charge and then touching the aluminum spheres with the charged material.

What are the properties of charged aluminum spheres?

Charged aluminum spheres have a high charge to mass ratio, meaning they have a greater amount of charge compared to their size. They also have a tendency to repel each other due to their like charges.

What are the applications of charged aluminum spheres?

Charged aluminum spheres are commonly used in experiments to demonstrate the principles of electrostatics and charge distribution. They can also be used in electrophoresis to separate particles based on their charge.

How do charged aluminum spheres behave in different environments?

In a vacuum, charged aluminum spheres will not experience any air resistance and will continue to repel each other due to their like charges. In a non-vacuum environment, air resistance may cause the spheres to move closer together and eventually neutralize their charges.

Similar threads

How Many Electrons Are in Aluminum Spheres?
    • Introductory Physics Homework Help
Replies
5
Views
4K
Understanding Fundamentals of Electronics: Solving an Electric Charge Problem
    • Introductory Physics Homework Help
Replies
11
Views
1K
Determine the net charge of sphere C
    • Introductory Physics Homework Help
Replies
2
Views
1K
Charged Aluminum Sphere electrons
    • Introductory Physics Homework Help
Replies
12
Views
17K
Calculating the number of electrons given the force of repulsion
    • Introductory Physics Homework Help
Replies
5
Views
3K
Fractioned electrons, what do they mean?
    • Introductory Physics Homework Help
Replies
4
Views
2K
+ charged sphere and - charged sphere touch and separate
    • Introductory Physics Homework Help
Replies
2
Views
3K
Calculating how many surplus electrons on each sphere
    • Introductory Physics Homework Help
Replies
1
Views
6K
Forces between charged particles
    • Introductory Physics Homework Help
Replies
1
Views
4K
Finding the Electric Field Inside a Charged Sphere
    • Introductory Physics Homework Help
Replies
21
Views
2K

Hot Threads

Recent Insights

Back
Top