Chromium occurs naturally as four isotopes: ⁵⁰Cr with a mass of 49.9460 amu,⁵²Cr with a mass of 51.9405 amu,⁵³Cr with a mass of 52.9407 amu,and ⁵⁴Cr with a mass of 53.9389 amu.Based on the information that is given on the periodic table,which isotope is the most abundant? A)(⁵⁰Cr) B)(⁵²Cr) C)(⁵³Cr) D)(⁵⁴Cr)

Question

Quizplus · Accepted Answer

The most abundant isotope of chromium is the one with the highest percentage abundance on the periodic table, which is the average of all the isotopes. To calculate this, we need to know the percentage abundance of each isotope. This information is not provided in the question, so we have to assume that the percentages are roughly equal to the relative atomic masses. Using this assumption, we can calculate the average atomic mass of chromium: (49.9460 amu + 51.9405 amu + 52.9407 amu + 53.9389 amu) / 4 = 52.00 amu This value is closest to the atomic mass of the isotope with a mass of 51.9405 amu, so we can conclude that B) (⁵²Cr) is the most abundant isotope of chromium.

Chromium Occurs Naturally as Four Isotopes: 50Cr with a Mass

Chromium Occurs Naturally as Four Isotopes: ⁵⁰Cr with a Mass