Is it true that reactive oxygen species (ROS) have only one electron and that causes them to be unstable and thus try to grab an electron from other molecules?

I know that we can google it up but I want confirmation about it apart from wikipedia and the book and research paper I’m reading. It’s important that I illustrate the fact accurately as I’m rewriting a scientific paper for general reading on the therapeutic effects of hydrogen and how it neutralizes the most damaging ROS.

I’m trying to put it in layman’s term how ROS comes about and part of it would require me to explain the premise of why atoms need to be stable.

I would appreciate any and all personal knowledge anyone would have about ROS and what it would take to stabilize them. I have a lot of research but I would like to hear how things are explained in layman’s terms and correlate that back to points I would like to expand from the research papers.

I am not a professional and was trained in the humanities so you can understand my predicament. Those with background in microbiology, chemistry who can help would be most appreciated.