# Alpha particle

1. Jun 25, 2010

### randomss444

1. The problem statement, all variables and given/known data

What is the charge of an alpha particle?

Charge of electron = 2.50x10^-21

2. Relevant equations

3. The attempt at a solution

Would you have to multipy 2.50x10^-21 x 2 to get the charge?

2. Jun 25, 2010

### rock.freak667

The charge of an electron is 1.6x10-19C. Use that instead.

3. Jun 25, 2010

### iomtt6076

Where does that number come from and what are the units? I ask because I thought the charge of an electron is -1.602 x 10^-19 Coulombs.

An alpha particle is two protons and two neutrons. Only the protons have charge so...

4. Jun 25, 2010

### randomss444

Okay the charge of the proton is 1.60x10^-19 C. What I am asking is what is the charge of an alpha particle. Do you have to multiple the charge by 2 because there are two protons? Or is the charge just 1.60x10^-19 C.

Thanks

5. Jun 25, 2010

### graphene

Yes, you would have to multiply by two.

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