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Periodic Classi...

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  • Question 1
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    How many groups and periods are present in the modern periodic table?

  • Question 2
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    Electropositive character of elements in a period ___________ from left to right.

  • Question 3
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    How does the valency vary in going down a group?

  • Question 4
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    An element P belongs to the second period and group 13. What is the formula of its oxide?

  • Question 5
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    What is the nature of an element having atomic number 20?

  • Question 6
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    Which group elements are called transition metals?

  • Question 7
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    What property of all elements in the column of the periodic table as fluorine have in common?

  • Question 8
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    Which elements are called as synthetic elements?

  • Question 9
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    In Newlands law of octaves elements are arranged in order of

  • Question 10
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    How many elements did Mendeleev classify?

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