A percent can be constituted-of-or-filled-with hydrogen.Logical formLearned from4 sentences. Volcanic activity may produce a tenth of a percent of hydrogen.Logical formLearned from4 sentences. (Hydrogen atoms) may be attached to a (carbon atom).Logical formLearned from4 sentences. A saturated (fatty acid) may have a number of (hydrogen atoms).Logical formLearned from4 sentences. Hydrogen can be ubiquitous.Logical formLearned from4 sentences. Hydrogen may be made in a big bang.Logical formLearned from4 sentences. A molecule may form some (hydrogen bonds).Logical formLearned from4 sentences. Bombs may be made of (hydrogen peroxide).Logical formLearned from4 sentences. A hydrogen can be dense.Logical formLearned from4 sentences. A flame can be constituted-of-or-filled-with hydrogen.Logical formLearned from4 sentences. Opposition can be to a (hydrogen bomb).Logical formLearned from4 sentences. A (ground state) may pertain-to a (hydrogen atom).Logical formLearned from4 sentences. (Hydrogen clouds) can be ionized.Logical formLearned from4 sentences. Compounds can be with hydrogen.Logical formLearned from4 sentences. The sun may be powered by a fusion of (hydrogen nuclei).Logical formLearned from4 sentences.