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The nucleus of an atom consists of______: Protons and neutrons
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Which of the following pairs is incorrect? Heterogeneous mixture of two or more things
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Atomic weight of uranium 92U^238 is______: 238
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Which of the following is a chemical change? Burning of candle
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Which of the following does not belong to the halogen family? Morphine
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Which among the following is not a noble gas? Rayon
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Which of the following is the hardest substance? Diamond
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The chemical name of laughing gas is______: Nitrous oxide
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The nucleus of a hydrogen atom consists of______: One proton + one neutron, One proton + two neutrons, One proton only
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The bond formed by transfer of electrons from one atom to another is______: Ionic
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Mass of an electron is______: 9.11*10^-31 kg