QuestionAnalyze the isotope data for element $(X)$: Unknown-20: 9048, Unknown-21: 27, Unknown-22: 925. Estimate average mass and identify the element.

Studdy Solution
Calculate the average atomic mass.
$$Average\, atomic\, mass =20 \times90.48\% +21 \times0.27\% +22 \times9.25\% =20.18$$The average atomic mass of the element is20.18. Looking at the periodic table, the element with an atomic mass closest to this is calcium (Ca), with an atomic mass of20.18. Therefore, the unknown element is likely to be calcium.
As for the mass spectrometer graph, it would have three peaks at mass numbers20,21, and22. The peak at20 would be the highest, representing the most abundant isotope, while the peak at21 would be the smallest, representing the least abundant isotope.