Chemistry: The Molecular Nature of Matter and Change 7th Edition

Published by McGraw-Hill Education
ISBN 10: 007351117X
ISBN 13: 978-0-07351-117-7

Chapter 24 - Problems: 24.5

Answer

See explanation below.

Work Step by Step

The stability of a nuclide is determined from the ratio of number of neutrons to protons that is N/Z ratio. If N/Z ratio is either too high or too small then the nuclide is unstable. So 3He2, N/Z ratio is 1/2=0.5 But for 2He2, N/Z ratio is 0/2=0, this shows that 2He2 is highly unstable. This explains why 3He2 is stable and 2He2 is undetectable.
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