system
Given the following post, respond as if you're commenting on Reddit:
human
What is daily life like for an atom in the sun?

Of course I don't mean 'life' literally. I'm wondering about the quantum state of e.g. a hydrogen atom/nucleus in the sun. Is it constantly changing? What does it mean to be a hydrogen atom in a plasma, is it always gaining and losing electrons? Or is it like a sea of electrons with a bunch of nuclei floating in it, and those nuclei are the same from moment-to-moment? 

Of course some atoms are undergoing fusion at any given moment, but most of them are not. What is life like for the atoms that are not being fused?

(I do not know anything about quantum physics).
gpt
As you already have suspected, the atoms inside of the sun are completely ionised, so we only have nuclei and electrons floating around. 

These nuclei are about 75% Hydrogen, so mostly just a proton, and 25% Helium. Of course there are some others but in more or less negligible amounts. 

For our sun, only the hydrogen in its core gets fused, the nuclei in the surrounding radiative and convective zones don’t have any nuclear reactions taking place. The „life“ of a nucleus here should be pretty boring. 

In the center we have fusion. This can take place in different ways, but in all cases the actual probability for a specific nucleus is really tiny. On average, a proton lives for 9 billion years inside the sun before it undergoes fusion. In the most common reaction two protons fuse to produce hydrogen-2. one proton needs to be converted to a neutron, for which a weak interaction is needed, hence the low probability. Hydrogen-2‘s lifetime in the sun is much shorter because it can just catch another proton to become helium-3. Two 3He finally fuse to a helium-4 and two protons. This step also takes much less time than the initial step. There are other reactions happening, but those only account for less than 20% of the suns energy output. 

So Tldr; most of the nuclei and electrons in the sun just float around, lightly bumping into each other, maybe absorbing and re-radiating some photons, but the exciting stuff is pretty rare.