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Study the table below and answer the questions that follow.

ElementAtomic
radius (nm)
Ionic
radius (nm)
Formula
of oxide
Melting point
of oxide (ÂșC)
 A 0.364 0.421 A2O -119
 B 0.830 0.711 BO2 837
 E 0.592 0.485 E2O3 1466
 G 0.381 0.446 G2O5 242
 J 0.762 0.676 JO 1054

  1. Which elements are non-metals? Give a reason. 
  2. Explain why the melting point of the oxide of E is higher than that of the oxide of G. 
  3. Give two elements that would react vigorously with each other. Explain your answer.

1 Answer

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  1. Which elements are non-metals? Give a reason.
    • A and G
    • The ionic radius is greater than the atomic radius
  2. Explain why the melting point of the oxide of E is higher than that of the oxide of G. 
    • The oxide of E contains strong electrostatic forces since it is ionic while the oxide of G has weak intermolecular forces // van der waals forces since it is molecular.
  3. Give two elements that would react vigorously with each other. Explain your answer. 
    • B and A.
    • B is the most reactive metal while A is the most reactive non metal
    • // B has the largest atomic radius so loses electrons most readily while A has the smallest atomic radius so it gains electrons most readily.

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