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Study the data in the table below and answer the questions. The letters do not represent the actual symbols of the elements.

 Element  Atomic number  Boiling point °C
    P      3     1333
    Q     13      2470
    R     16      445
    S     18    −186
    T     19       774
  1. Select the elements that belong to the same    
    1. Group
    2. Element
  2. Which element:
    1. Is a gas at room temperature? Explain.     
    2. Does not take an oxide    
  3. Write the:
    1. Formula of the Sulphate of element Q   
    2. Equation for the reaction between elements P and R   
  4. What type of bonding would exist in the compound formed when elements R and Q react? Give a reason for your answer.  
  5. Select the most electropositive element 
  6. Explain why the boiling point of element Q is higher than that of element P. 

1 Answer

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 Element  Atomic number  Boiling point °C
    P      3   2.1     1333
    Q     13  2.8.3      2470
    R     16  2.8.6      445
    S     18  2.8.8    −186
    T     19  2.8.8.1       774
  1.  
    1. P and T
    2. Q,R & S
  2.  
    1. S, It's boiling point is below room temperature
    2. S
  3.  
    1. Q2(SO4)3
    2. 2P(s)+R(s)→P2R(s)
  4. Ionic
    Q transfers it's electrons to R when they react.
  5. ​​​​​​​T
  6. Q has strong metallic bond than P, it has more delocalised electrons hence strong metallic bond​​​​​​​

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