Which of the following elements does not exhibit the electrovalencey?
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Who discovered the electron?
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What property of an element determines its chemical behaviour?
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Which of the two will be chemically more reactive, Sulphur(S) with atomic number 16 or Chlorine (Cl) with atomic number 17?
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Which radioactive element is used in the treatment of cancer?
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What was the source of alpha particles in Rutherford scattering experiment?
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Why was the Thomson’s Model of an atom failed?
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Which isotope is used in the nuclear power plants to generate electricity?
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Which of the following pairs are isobars?
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Which of the following statements does not form a part of Bohr’s model of hydrogen atom?
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