Re: Do evolutionists have the answers? (don't be silly)

In message <pb32b5tvrgqlcph3lvlij9fcfq336nurgf@xxxxxxx>, Hatunen <hatunen@xxxxxxx> writes
On Wed, 16 Sep 2009 01:27:40 -0700 (PDT), spintronic
<spintronic@xxxxxxxxxxx> wrote:


Let me ask you another question.


A proton has 1.6726231*10^-27Kg.
A electron has 9.1093897*10^-31Kg.

After they bind and lose

(2 * (pi^2) * ((1 / (4 * pi * (8.854187817 * (10^(-12)))))^2) *
((1.60217733 * (10^(-19)))^4) * (9.1093897 * (10^(-31)))) /
((6.6260755 * (10^(-34)))^2) = 2.17987406 × 10-18j

What is their mass?

Oh that's right.

It's less.

I'm not sure where you got your math, but the mass of a proton is
1.0061 amu and the atomic mass of an electron is 5.489 E-4 amu.
The atomic mass of a hydrogen atom is 1.00794 amu. Obviously, the
mass of a hydrogen atom is greater than the sum of the masses of
its component proton and electron. The increase in mass is
largely due to the binding energy.


I'm confused - I thought that as when an electron recombines with a proton to form a hydrogen atom energy is released in the form of a photon, and hence by conservation of (mass-)energy the mass of the Hydrogen atom would be less, not greater, than the combined masses of isolated protons and electrons - I presume that we can neglect the complications introduced by GR here. (There is normally kinetic energy involved, but we can consider the idealised situation where the proton and electron are at rest with respect to each other.) I estimate the difference to be about 2.5 x 10-32 kg.

Google's not being cooperative about finding a precise figure for the mass of a 1H atom, but the figures I've found are

proton - 1.67262158 × 10-27 kg (1.0728 amu)
electron - 9.10938188 × 10-31 kg
sum - 1.67353257 × 10-27 kg (1.007828 amu)
atom - 1.6735... × 10-27 kg (1.007825 amu)

which is about in accordance with my expectation.

I suspect that the figure of 1.00794 amu for Hydrogen is a mean figure including the 0.015% of Deuterium atoms.
--
alias Ernest Major

.

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