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Name: Helge
Status: student
Age: 17
Location: N/A
Country: N/A
Date: 2000-2001 - Revised August 2008

I am a 17 year old boy from Norway, currently working on my homepage. It is about particle physics, so therefore I have a question. What is the weight of a proton measured in kilograms?


H (hydrogen) has one proton and one electron. Its weight is primarily due to its single proton. A proton is 1836 times heavier than an electron. Since a mole of H2 (molecular hydrogen) weighs 2 grams and has 6.022 x 10E23 atoms (Avagadro number), then the weight of each hydrogen atom is approximately 0.001 kg/6.022 x 10E23 = 1.6726E-27 kg.


Dr. Ali Khounsary
Advanced Photon Source
Argonne National Laboratory
Argonne, IL 60439

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