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): When a positively charged metal ion and the valence electrons it shares emit a force of attraction, it is called a metallic bond.