Computational chemistry and molecular dynamics simulations span an extensive range of time scales, successfully capturing fast femtosecond dynamics as well as slow processes occurring on millisecond timescales.
The claim states that computational chemistry calculations span time scales from femtoseconds to milliseconds. Multiple retrieved papers directly discuss or utilize simulations operating across this exact range, combining femtosecond-level ab initio or pump-probe dynamics with millisecond-scale diffusion, reaction, or structural simulations (e.g., papers 0, 1, and 2). Therefore, the claim is fully supported by the provided evidence.