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LAKHMIR SINGH & MANJIT KAUR-ATOMS AND MOLECULES-Exercise
- (a) What is the significance of the symbol of an element ? Explain w...
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- (a) What is an atom ? How do atoms usually exist ? (b) What i...
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- (a) Define atomic mass unit. What is its symbol ? (b) Define atomic...
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- The atomicites of ozone, sulphur, phosphorus and argon are respectivel...
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- The symbol of a metal element which is used in making thermometers is ...
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- The Latin language name of an element is natrium. The English name of...
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- The atomic theory of matter was proposed by :
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- One of the following elements has an atomicity of 'one' . This ele...
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- The English name of an element is potassium, its Latin name will be...
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- The law of conservation of mass was given by :
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- The element having atomicity 'four' is most likely to be :
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- If 1.4 g of calcium oxide is formed by the complete decomposition of c...
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- The law of constant proportions was given by
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- Out of ozone, phosphorus, sulphur and krypton, the elements having the...
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- One nm is equal to :
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- The scientist who proposed the first letter (or first letter and anoth...
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- The atoms of which of the following pair of elements are most likely ...
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- Which of the following elements has the same molecular mass as its ato...
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- In water, the proportion of oxygen and hydrogen by mass is :
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- In hydrogen peroxide (H(2)O(2)), the proportion of hydrogen and oxyg...
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