Question

An unknown element X has the following isotopes: ⁵²X (81.50% abundant), ⁴⁹X (8.00% abundant), ⁵⁰X (10.50% abundant). What is the approximate atomic mass of X?

Answer 1

The approximate atomic mass of element X with isotopes 52 X, 49 X, and 50 X, with respective abundances, is calculated to be 51.55 amu.

Step-by-step explanation:

To calculate the approximate atomic mass of element X with its given isotopes, we use the isotopic masses multiplied by their respective abundances, and then sum these values. The calculation for element X with isotopes 52 X (81.50% abundant), 49 X (8.00% abundant), and 50 X (10.50% abundant) would be as follows:

Atomic mass= (0.8150 × 52 amu) + (0.0800 × 49 amu) + (0.1050 × 50 amu)

This equals to:

(0.8150 × 52) + (0.0800 × 49) + (0.1050 × 50) = 42.38 amu + 3.92 amu + 5.25 amu = 51.55 amu

Thus, the approximate atomic mass of element X is 51.55 amu.