How to calculate the mass of a hydrogen atom

[reemie]

The answer according to my booklet is 1.6734×10^-24 (g), but I don't understand how we got this answer.

proton: 1.6725×10^-24
neutron: 1.6748×10^-24
electron: 0.0009×10^-24

To get the mass, I added protons with neutrons, but I got 3.3473×10^-24.

What am I doing wrong?

 

[Borek]

Why do you think there is a neutron present?

 

[reemie]

Why do you think there is a neutron present?

Because the mass number is the sum of protons and neutrons, correct?

Edit:

I realized that hydrogen doesn't have any neutrons, so we should only consider the protons. But that still gives the wrong answer.

And when I subtract the number of protons from the answer, I get 9x10^-28, and I can't figure out where this number came from.

 

[SteamKing]

Because the mass number is the sum of protons and neutrons, correct?

Edit:

I realized that hydrogen doesn't have any neutrons, so we should only consider the protons. But that still gives the wrong answer.

And when I subtract the number of protons from the answer, I get 9x10^-28, and I can't figure out where this number came from.

Do you think that the mass of a hydrogen atom might be affected by the presence of another particle, perhaps? Hint: Look at the list in the OP.

 

[Neon]

Hello? The hydrogen you created is a postively charged atom a which not good. soo