A hydrogen can be radioactive.Logical formLearned from10 sentences. Stars may burn hydrogen.Logical formLearned from10 sentences. (Hydrogen bombs) may undergo a testing.Logical formLearned from10 sentences. A new generation can be constituted-of-or-filled-with (hydrogen bombs).Logical formLearned from10 sentences. Batteries may produce (hydrogen gas).Logical formLearned from10 sentences. (Hydrogen bonds) can be short.Logical formLearned from10 sentences. Catalysts can be for (hydrogen production).Logical formLearned from10 sentences. Hydrogen may be added.Logical formLearned from10 sentences. Hydrogen may be bonded.Logical formLearned from10 sentences. A star may use_up a (hydrogen fuel).Logical formLearned from10 sentences. A (hydrogen chilldown) can be liquid.Logical formLearned from10 sentences. A coal-fired (power plant) may produce some hydrogen.Logical formLearned from10 sentences. Treatment can be with (hydrogen peroxide).Logical formLearned from10 sentences. (Hydrogen ions) can be positive.Logical formLearned from10 sentences. A (hydrogen fuel tank) can be liquid.Logical formLearned from10 sentences.