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NCERT BANGLISH- GROUP 1 s - BLOCK ELEMENTS -QUESTIONS (B.FILL IN THE BLANKS)
- The first element in the periodic table is.
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- is the common formd of hydrogen.
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- The half-life of tritium is
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- Deuterium reacts with ammonia to form
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- The rare isotope of hydrogen is
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- is employed in nuclear reactor to slow down the speed of fast moving n...
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- The magnetic moment of para hydrogen is
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- Hydrogen peroxide was first prepared by in
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- Pure H(2)O(2) is
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- The Arabic word Alquili' means
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- The electronic configuration of potassium is
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- All alkali metals have melting and boiling points
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- On moving down the group of alkali metals, ionization energy
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- the lightest of all solid elements.
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