Relative Atomic Mass & Relative Molecular Mass
Based on Hydrogen Scale:
Therefore, there is weakness of this method:
- Not many elements can react readily with hydrogen or are unable to displace hydrogen.
- it was found that the relative masses of some elements were not accurate.
- hydrogen exists as a gas at room temperature, it is difficult to handle.
- it has a number of isotopes with different masses
At present, Carbon-12 is used as the standard atom of comparison internationally.
IMPORTANT:
CALCULATION:
