'A single molecule of H2O' vs 'a single atom of H2O'

[Indranil]

What is "one proton of H atom"?

The mass of the hydrogen atom is the mass of the entire atom, namely the proton, the electron, and the mass equivalent to the binding energy (a hydrogen atom weighs less than the sum of the mass of a lone proton and a lone electron).

Then which one I use for the mass of one H atom 1.1.67353×10-24 g or 2 1.6726219 × 10-24 g. Could you suggest me?

 

[DrClaude]

Then which one I use for the mass of one H atom 1.1.67353×10-24 g or 2 1.6726219 × 10-24 g. Could you suggest me?

I said it already. The mass of one hydrogen atom, made up of 1 proton and 1 electron, is 1.1.67353×10^-24 g.

The mass of the most common isotope of hydrogen, 1H, is actually 1.007 825 032 23 g/mol, or 1.67353×10-24 g for one atom.

 

[Indranil]

I said it already. The mass of one hydrogen atom, made up of 1 proton and 1 electron, is 1.1.67353×10^-24 g.

Thank you all

 

[berkeman]

Thank you all

This sounds like a good place to close out the thread. Thank you to all who have tried to help @Indranil