"Iron atoms" refers to individual particles of the element iron.
Sentences with «iron atoms»
When the platinum nanoparticles catch molecules from the surrounding gas and combine them with oxygen atoms from the iron - oxide surface, a surplus of iron atoms remains. (sciencedaily.com)
Another reason it takes so long is because iron atoms in the sun's interior absorb — and hold — some of the energy that passes by them. (sciencenewsforstudents.org)
X-ray observations of emission from iron atoms close to black holes may determine for the first time whether the black holes are rotating or not. (stsci.edu)