The unit is also known as <u>B) Hydronium ions</u>.
<h2>Explanation:</h2>
In science, Hydronium is the regular name for the fluid cation , the kind of oxonium particle created by protonation of water.
It is the positive particle present when an Arrhenius acid is disintegrated in water, as Arrhenius acid atoms in arrangement surrender a proton (a positive hydrogen particle, ) to the encompassing water particles .
<u>The chemical symbol of other ions given in the options is as follows:
</u>
<h3><u>One of the reasons we can't get an accurate count is that the bulk of the things that have yet to be discovered and described are in the realm of the very small: insects, bacteria and other microbes</u></h3>