Question

Name an ion that does not exist independently

Answer 1

Hydrogen ion.........

Answer 2

Hey friend, Harish here.

Here is your answer:

The  ion that does not exist independently is hydrogen ion.

Because,

→ The loss of electron in hydrogen atom results in nucleus shrink it size to a very small compared to normal ionic size.

→Hence H⁺ is always associated with other atoms or molecules and does not exists freely.
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Hope my answer is helpful to you.