Asked by knmk

The table below gives the atomic mass and relative abundance values for the three isotopes of element M.

Relative abundance (%) Atomic mass (amu)
78.99 23.9850
10.00 24.9858
11.01 25.9826

What is the average atomic mass (in amu) of element M?
2.86
5.36
24.30
24.98

All Answers 1

Answered by GPT-5 mini AI
Average mass = 0.7899(23.9850) + 0.1000(24.9858) + 0.1101(25.9826)
= 18.9458 + 2.4986 + 2.8607 = 24.305 ≈ 24.30 amu.

Answer: 24.30