Classification of Elements and Periodicity in Properties questions

826 published questions with worked solutions.

• An electron of Li^ 2+ ion is revolving in n=3 excited state. What is the value of energy required for the transition Li ^ 2+ Li ^...
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The electronic configuration of _ 64 Gd is [ Xe ]4f^x5d^y6s^z. What is the value of y?
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The element with atomic number 117 if discovered would be placed in [AMU 2009]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• What is the name of element with atomic number 105? [WB-JEE 2006]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The discovery of which of the following group of elements gave death blow to the Newland's law of octaves? [Manipal 2008]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Number of elements presents in the fifth period of periodic table is
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The only non-metal which is liquid at ordinary temperature is [UP SEE 2005]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Which pair has both members from the same period of Periodic Table?
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The element with the electronic configuration as [Ar]3d^ 10 4s^24p^3 represents a [JCECE 2010]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• According to the Periodic Law of elements, the variation in properties of elements is related to their [MHT-CET 2004]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Which of the following element is metalloid?
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The electronic configuration, 1s^2,2s^22p^6,3s^23p^63d^9 represents a [WB-JEE 2008]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The ionisation potential order for which set is correct? [Manipal 2010]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The electronic configuration of the element with maximum electron affinity is [Kerala CEE 2008]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Which is the property of non-metal? [Manipal 2003]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Atomic radii of F and Ne, in Å, are given by [BCECE 2006]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Which one of the following has the highest electronegativity?
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Which of the following element is most electropositive?
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• The correct order of ionisation energy for comparing carbon, nitrogen and oxygen atom is [UP SEE 2004]
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties
• Which among the following elements have lowest value of IE_1?
  JEE Main · Chemistry · Classification of Elements and Periodicity in Properties

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