10th Class Science Solved Paper - Science-2017 Delhi Set-I

  • question_answer
    An element P (atomic number 20) reacts with an element Q (atomic number 17) to form a compound. Answer the following questions giving reason:
    Write the position of P and Q in the Modern Periodic Table and the molecular formula of the compound formed when P reacts with Q.


    P = 20: 2, 8, 8, 2
    Q =17: 2, 8, 7
    P = Period 4 and Group 2
    Q = Period 3 and Group 17
    Hence formula of the compound formed between P and Q is \[P{{Q}_{2}}\]

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