Explain the need for a reference atom for atomic mass. Give some information about two reference atoms
Answers
Atomic mass is the sum of electron and neutron in atoms numbers of atoms are present in the atomic mass hands to determine atomic number the reference of atomic mass is needed
Answer:
point 1 in atom is very very tiny it was not possible for the scientist of the 19th Century to measure atomic mass accurately that for the concept of relative mass of an Atom was put forth reference Atom was required for expressing the relative mass of an atom the hydrogen atom being the lightest was initially chosen as the reference atom the relative mass of hydrogen atom which has only one Proton in its nuclear forces accepted as one therefore the magnitude of the relating masses of various atom became equal to the atomic mass number 3 + n p + n point to the mass of one nitrogen atom is 14 times than that of a hydrogen atom there for the relative mass of a nitrogen atom is 14 this is how the relative masses of various elements are determined on the scale the relative mass of atomic mass of elements came out to be fractional therefore in the course of time different items were chosen as reference atoms finally in 1961 Karda carbon atom was selected as a reference atom in this kill the relative mass of carbon atom was accepted as 12 the relative mass of 1 hydrogen atom becomes 12 into 1 by 12 that is won the mass of one proton and of one neutron on the scale of relative atomic mass is approximately