Chapter 3 – Classification of Elements and Periodicity in Properties Q&A


  1. Can u please provide the solution for the question ” Identify the group and valency of the element having atomic number 119. Also predict the outermost electronic configuration and write the general formula of its oxide” . How it can be calculated?

    1. It will be an alkali metal with valency 1. The outermost electronic configuration will be 8s1. The general formula of its oxide will be M2O (similar to most oxides of the alkali metals).

  2. useful but there should be some more objective ques

  3. Plz povide me with solutions of above answers

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