The mass spectrum represented above is most consistent with which of the following elements? Eu Gd Tb Dy

Here we have the average atomic mass given by the weighted average found by multiplying the abundance in nature of the various isotopes by their observed atomic masses followed by the summation of the multiplication results as follows;

Based on approximate measurement of the chart, we have the values for the relative abundance given as follows;

Isotope, I Relative abundance, A I×A

154 1 154

155 6 930

156 8 1248

157 6.2 973.4

158 10 1580

160 8.5 1360

Sum 39.7 6245.5

Average atomic mass = 6245.5/39.7 = 157.314 atomic mass unit

Atomic mass of Eu = 151.964 u

Atomic mass of Gd = 157.25 u

Atomic mass of Tb = 158.92535 u

Atomic mass of Dy = 162.5 u

Therefore, the mass spectroscopy is most consistent with the element Gd.

okpalawalter8 okpalawalter8 · Answer 2 · 2021-09-04T01:10:38+02:00

Complete Question is attached below

We have that the the mass spectrum represented above is most consistent with The element with atomic mass number is 158 is Gadolinium which is denoted as Gd

Option B

From the Question we are told that

The mass spectrum represented above is most consistent with which of the following elements

Eu
Gd
Tb
Dy

Generally

We consider the Spectrum

The most consistent atomic mass number is 158

The element with atomic mass number is 158 is Gadolinium which is denoted as Gd

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