Answer: The average atomic mass of chromium is 47.0
Explanation:
Given,
Mass of isotope Cr - 50 = 50
% abundance of isotope Cr-50 = 4.35% = [tex]\frac{4.35}{100}=0.0435[/tex]
Mass of isotope Cr- 52 = 52
% abundance of isotope Cr-52 = 83.79 % = [tex]\frac{83.79}{100}=0.8379[/tex]
Mass of isotope Cr- 54 = 54
% abundance of isotope Cr-54 = 2.37 % = [tex]\frac{2.37}{100}=0.0237[/tex]
Formula used for average atomic mass of an element :
[tex]\text{ Average atomic mass of an element}=\sum(\text{atomic mass of an isotopes}\times {{\text { fractional abundance}})[/tex]
[tex]Z=[(50\times 0.0435)+(52\times 0.8379)+(54\times 0.0237)][/tex]
[tex]Z=47.0[/tex]
The average atomic mass of chromium is 47.0
