How does the atomic mass of an element contain a mixture of isotopes and explains which is the most abundant of isotopes?
1 answer:
The relative abundances of the isotopes of an element is determined using mass spectrometry. A mass spectrometry isotope distribution graph is needed as shown in the picture. This is for the isotopes of Zirconium. The x-axis is the individual mass, while the y-axis is the relative abundance. For this example, the atomic weight of Zirconium is calculated as:
Atomic weight = 90 amu(50%) + 91 amu(11%) + 92 amu(18%) + 94 amu(19%) + 96 amu(2%) = 91.35 amu
Atomic weight = 90 amu(50%) + 91 amu(11%) + 92 amu(18%) + 94 amu(19%) + 96 amu(2%) = 91.35 amu
You might be interested in
Explanation:
(a) It is known that relation between energy and mass is as follows.
where, E = energy
m = mass
c = speed of light = m/s
As it is given that mass is kg. So, putting the given values into the above formula as follows.
=
=
Therefore, we can conclude that the energy produced by the reaction between one electron and one positron is .
(b) When gamma ray photons are produced then they will have the same frequency. Relation between energy and frequency is as follows.
E = ..... (1)
where, h = plank's constant =
= frequency
Also, ........ (2)
Hence, equating equations (1) and (2) as follows.
=
So,
=
=
Thus, we can conclude that the frequency is .