atoms in a body?

Question

approximately how many atoms are in a human body?

Answer 1

This question is extremely difficult to answer. Whose body? I am much taller than my 1 year old daughter and much shorter than Michael Jordan. I am fatter than Mary-Kate Olsen, but skinnier than Jack Black.....just for example.

Our sizes, in part, contribute to the amount of atoms in our bodies.

Let's go a bit further and ask what do you mean by "in"? The food I ate today is made of atoms and is still being digested in my body. Does this count? The water I'm drinking is made of atoms. What about that? The fillings in my teeth are made of atoms. Speaking of teeth, I've had my wisdom teeth removed. Some people still have theirs. And what about hair? Does that county? My wife has long hair...mine is short. However, I do have hairy arms and legs.

Question is too broad to answer. But if you based it on a person of average size, weight, food consumption, etc compared with the rest of the world...the answer would be in the trillions.

Answer 2

a 70kg body would have approx (very rough) 7 x 10^27 number of atoms.

this is probably off by a couple trillion (or more). but thats not to bad considering this is how it's written out:

7,000,000,000,000,000,000,000,000,000

basicly the number of atoms is so huge that well it's not goign to be likely to estimate very much closer then this.

if you want a slightly more acurate way of ficurign this out:

what is the predominante atoms in the body

hydrogen, oxygen,carbon, nitrogen, phospurus, sulfur.

those are the big 6 in decending order.

hydrogen makes up the most but it's also the lightest and since where going by mass on the measurement...well that means it does some little amounts. but theres tons of it! then you do oxygen content carbon content, etc etc

if you want to get even MORE technical you would have to assess the rare and trace elements: sodium, potasium, helium, even uranium!

if you want an even FURTHER assessment...well then we have some ethical but not technicly difficult assessment to do.

first build a giant thick steel container and put a human being inside. puree and mix untill it's a nice evenly distributed mix. heat and puree again. repeat till you have basicly broken said human being into nothing but low grade carboxyl molecules. take a small vapor sample and expose to a cromatograph. this will show you the basic elemental make up of this sample. assuming the pureeing and mixing distributed the human being evenly you can assume this same proportion will be the same in the larger sample. measure the mass of the full sample and break this mass up by the same proportions of the chromatograph measured. this is of course you can find a sensitive enough weight system to weigh in billionths of a mg and have the equipment can find someone to do the work OH and you need a test subject of course. all this and you will STILL be off by billions on this subject and even worse the proportions per person will be so far off because of different musculatures, fat proportions, etc etc that it will still not be even more accurate then the simple estimate for that weight range on different people.

ok that was more then you wanted to know i bet right?

Answer 3

As Carl Sagan's son would say, "Trillions and trillions....it is vast". How much does this human weigh? You can estimate it. The human body is approx. 80% water. Find the molecular weight of water and divide it into 80% of the person's weight. Then multiply that by 3 (H2O has 3 atoms). Then take 12% of the total number of atoms for water and add it together. There are heavier elements in the body so you can't give it full 20%.
Post it when you finish calculating. I'm curious.

lightpulse

Answer 4

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