Task: Paraphrasing
Input (English): Question: The force of attraction between a positively charged metal ion and the valence electrons it shares with other ions of the metal is called? 
Answer: metallic bond. 
Sentence: The force of attraction between a positively charged metal ion and the valence electrons it shares with other ions of the metal is called a(n) metallic bond.
Output (English): Positively charged metal ions emit a force of attraction between themselves and the valence electrons they share in a metallic bond.