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November 08, 2025, 04:02:13 am

Author Topic: Confused about relative isotopic mass (1&2 Chem)  (Read 1191 times)  Share 

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nerdmmb

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Confused about relative isotopic mass (1&2 Chem)
« on: March 09, 2014, 09:38:50 pm »
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Are we required to know how to calculate the RIM of an atom?

Also, is the mass number that has been given in the periodic table for each element the same as the element's relative atomic mass?

If so, then is the relative molecular mass the total number of atoms of an element multiplied by its relative atomic mass?

Thanks heaps!

IndefatigableLover

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Re: Confused about relative isotopic mass (1&2 Chem)
« Reply #1 on: March 09, 2014, 10:04:22 pm »
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Our school hasn't given us questions in regards to RIM (more about using RIM to calculate RAM actually...)

Yes the mass number given in the periodic table for each element is the same as the element's relative atomic mass (for one atom of it though (like the weight of Hydrogen is given as 1.01 which is one atom of Hydrogen).

The Relative Molecular Mass is the overall mass of a molecule. Essentially what you've said below is correct (where you multiply the total number of atoms of an element with its RAM) to find the RMM.

Hopefully I'm not wrong on any of those LOL (awks if I am ._.)

nerdmmb

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Re: Confused about relative isotopic mass (1&2 Chem)
« Reply #2 on: March 09, 2014, 10:42:35 pm »
+1
Our school hasn't given us questions in regards to RIM (more about using RIM to calculate RAM actually...)

Yes the mass number given in the periodic table for each element is the same as the element's relative atomic mass (for one atom of it though (like the weight of Hydrogen is given as 1.01 which is one atom of Hydrogen).

The Relative Molecular Mass is the overall mass of a molecule. Essentially what you've said below is correct (where you multiply the total number of atoms of an element with its RAM) to find the RMM.

Hopefully I'm not wrong on any of those LOL (awks if I am ._.)

Thanks heaps IndefatigableLover! Makes a lot of sense now :)