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ATOMS , MOLECULES AND IONS
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BHARATI BHAWAN (ENGLISH)-ATOMS , MOLECULES AND IONS -Very Short Answer Questions
- Who was the first to propose the concept of compound atom ?
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- What is meant by the gram- atomic mass of an element ?
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- The atomic masses of sodium and chlorine are 23 and 35.5 respectively ...
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- The atomic mass of Ca is 40 and the molecular mass of CaCO(3) is 100 ....
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- What is a symbol ?
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- What is an atom ?
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- Write the formula of calcium nitrate .
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- The molecular formula of sulphur is S . What do you understand by this...
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- Define valency of an element.
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- What is an ion ?
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- Write the chemical formula of the following : (a) Calcium chloride (...
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- Give the names of elements present in ammonium chloride .
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- What is the mass of 1 mole of oxygen atoms ?
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- Convert into mole : (a) 28 g of nitrogen atoms (b) 20 g of carbon ...
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