> The thing that I was interested in is whether or not a helium atom in the Earth‘s atmosphere has a way to be sucked into the fusing layer at some point. It s

> The thing that I was interested in is whether or not a helium atom in the Earth‘s atmosphere has a way to be sucked into the fusing layer at some point. It seems to me there are three possible fates for that helium, and two of them involve being used up by stellar fusion. The helium atoms get somehow pulled into the sun and so eventually get used up in a fusion reaction, the sun expands during its giant phase and envelops the Earth and the helium eventually gets used up in a fusion reaction, or the helium nuclei gets propelled out of the solar system with the solar wind. It'd actually be fun to estimate the odds of each option but I honestly have no idea. #3 feels like a long shot.