A citrate may be accompanied by a (hydrogen ion).Logical formLearned from2 sentences. A (hydrogen abundance) can be high.Logical formLearned from2 sentences. A (neutron spectrometer) may detect deposits of hydrogen.Logical formLearned from2 sentences. (Ultraviolet radiation) may free a (hydrogen atom) from water.Logical formLearned from2 sentences. A fuel can be (hydrogen gas).Logical formLearned from2 sentences. Neutral hydrogen may undergo an (absorption line).Logical formLearned from2 sentences. Levels of hydrogen may be detected.Logical formLearned from2 sentences. Hydrogen may undergo observations.Logical formLearned from2 sentences. A hydrogen may pertain-to a cloud.Logical formLearned from2 sentences. A person may design a (hydrogen bomb).Logical formLearned from2 sentences. Ribbons may be passivated by (hydrogen atoms).Logical formLearned from2 sentences. Hydrogens can be explicit.Logical formLearned from2 sentences. An atom may participate in (hydrogen bonding).Logical formLearned from2 sentences. (Hydrogen atom coordinates) may be replaced.Logical formLearned from2 sentences. (Hydrogen constraints) may be applied.Logical formLearned from2 sentences.