Question

Calculate the average atomic mass of Ne given the following information about its naturally occurring isotopes.

a. 19.99 u
b. 20.18 u
c. 20.17 u
d. 20.18 g/mol

Answer 1

To calculate the average atomic mass of Neon (Ne), we need to consider the abundance and mass of each naturally occurring isotope of Neon.

Step-by-step explanation:

To calculate the average atomic mass of Neon (Ne), we need to consider the abundance and mass of each naturally occurring isotope of Neon. Given the following information:

• Ne-20: Abundance = 90.92%, Mass = 19.99 u
• Ne-21: Abundance = 0.3%, Mass = 20.99 u
• Ne-22: Abundance = 8.85%, Mass = 21.99 u

We can calculate the average atomic mass using the formula:

Average Atomic Mass = (Abundance of Ne-20 * Mass of Ne-20) + (Abundance of Ne-21 * Mass of Ne-21) + (Abundance of Ne-22 * Mass of Ne-22)

Substituting the values:

Average Atomic Mass = (0.9092 * 19.99) + (0.003 * 20.99) + (0.0885 * 21.99)

Average Atomic Mass = 20.18 u