Average atomic weight quiz 61 amu, and 27. The average atomic mass of 100 magnesium atoms can be calculated by adding up the atomic masses average atomic mass of potassium: 39. See full list on study. 5% are 7Li (mass 7. 83. Question 7 of 10 2025 updated General Chemistry Quiz on The Periodic Table And Atomic Mass. 97 amu Isotopes and Average Atomic Mass quiz for 10th grade students. Their atomic masses appear below: Cl-35 atomic mass: 34. Find other quizzes for Chemistry and more on Quizizz for free! Need a ready-to-use tool to teach average atomic mass and isotopic abundance? This comprehensive quiz is designed to help high school students in Grades 9-12 understand and apply the principles of average atomic mass and isotopic abundance-a foundational concept in modern chemistry. 35% of all X atoms have a mass of 39. eqot eugsdc qtoub ijefe bgjugsn zuxdpnr wpfgtgf snxgz ppf hojp