Question & Answer: A)If the atomic mass of magnesium is determined to be 24.305 amu and 79.00% of magnesium…..

A)If the atomic mass of magnesium is determined to be 24.305 amu and 79.00% of magnesium atoms are determined to be 24Mg, calculate the abundance of 25Mg and 26Mg.

B)An atom is selected at random from a sample of magnesium. What is the probability that its mass (in amu) is equal to that of the atomic mass? Explain.