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Classification of Elements and Periodicity in Properties — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryClassification of Elements and Periodicity in Properties2 Marks
Question
  1. How do the electronic configurations of the elements with Z = 107 to 109 differ from one another?
  2. Rn (Z = 86) is the last noble gas discovered. Predict what will be the atomic number of the next noble gas to be discovered. Write its symbol.
✓

Answer

  1. Element with Z = 107 has five, Z = 108 has six electrons while Z = 109 has seven 6d-electrons. Thus, these elements differ in the number of electrons in the 6d-subshell.
  2. 118, Uuo.

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