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Standard IX
Chemistry
Molecular Mass
68. Atomic we...
Question
68. Atomic weight of calcium is 40amu on C-12 scale.If 1/10 of an atom of C-12 is taken as standard then relative atomic weight of calcium will be ?
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Q.
The atomic weight of silicon is
28.086
and that of oxygen is
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Q.
The atomic weight of an unknown element, in atomic mass units (amu), is approximately
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Calcium, X and Barium are the elements that can form a Dobereiner's triad. Identify the atomic weight of the element X.
[ Atomic weight of calcium = 40 u, Atomic weight of Barium = 137 u]
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According to modern atomic theory atoms of argon and calcium have same atomic weight, these are known as :
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Dalton based his relative atomic weight scale on :
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