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DINESH PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-Test Your Knowledge (Short Answer Questions)
- In the modern periodic table calcium (atomic number 20) is surrounded ...
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- Explain the variation in the following properties of the elements in t...
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- Na, Mg and Al are the elements having one, two and three valence elect...
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- Given below are the atomic radii of some elements of second period. ...
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- The elements Li, Na and K, each having one valence electron, are in pe...
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- An element X (atomic number 17) combines with an element. Y (atomic nu...
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- Calcium forms the following salts : Calcium oxide -CaO, Calcium hydr...
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- State Modern Periodic Law ? Why is it considered better than Mendeleev...
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- (a) The oxide of an element has the formula X(2)O(3). Write the formul...
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- The atomic size of an element increases down the group while along a p...
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- Two elements X and Y have atomic number 12 and 17 respectively. (i) ...
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- (a) Name metals among first five elements of the Modern Periodic Table...
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- An element 'X' belongs to 3rd period and group 16 of the Modern Period...
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- Write the names given to the vertical columns and horizontal rows in t...
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