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SWAN PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS -ADDITIONAL IMPORTANT QUESTIONS (Very Short Answer Type Questions)
- What were thae criteria used by Mendeleev in creating his periodic tab...
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- Atomic radius of hydrogen is 37pm. Express it in metres.
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- Name the most metallic and most non-metallic elements in the Periodic ...
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- The atomic numbers of three elements X, Y and Z are 3, 11 and 17 respe...
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- Which one has the bigger size? Na (11) or Cl (17), CI (17) or F (9)
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- Size of sodium atom- is bigger than that of hydrogen atom. Why?
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- How many elements are known till today ?
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- Out of two elements potassium and sodium, which one can lose electron ...
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- Name the elements discovered after mendeleev's periodic table?
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- Name a halogen other than chlorine, bromine and iodine.
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- Who gave the law of octaves?
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- Náme group of elements which were not known at the time when Mendelee...
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- What was the need for the classification of elements?
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- Why are the elements of group 18 called zero valent?
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- What is the maximum number of electrons in the outermost shell of an a...
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- How many elements are known till today ?
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