10th Class Science Solved Paper - Science-2016 Outside Delhi Set-I

  • question_answer
    An element 'X' belongs to 3rd period and group 16 of the Modern Periodic Table.
    (a) Determine the number of valence electrons and the valency of 'X'.
    (b) Molecular formula of the compound when 'X' reacts with hydrogen and write its electron dot structure.
    (c) Name the element X' and state whether it is metallic or non-metallic.                        
     

    Answer:

    \[X=2,\,8,\,6\]
    (a)        Valence electrons are 6
                Valency = 2
    (b)        Formula \[={{H}_{2}}X\]
               
    (c)        X is sulphur, it is a metal.


adversite


You need to login to perform this action.
You will be redirected in 3 sec spinner

Free
Videos