For example, the oxygen atom has eight electrons, the atom of iron has 26 electrons. Once Bohr tried to use his model to predict the spectral lines of more complex atoms, the results became ...

Catalysts facilitate crucial chemical reactions in nature and industry alike. In a subset of them, catalytic activity is ...

one atom-at-a-time, and can simultaneously measure its chemical state.” Saw Wai Hla When X-rays illuminate an iron atom, the core level electrons are excited. X-ray excited electrons are then ...