context: Chlorine is a chemical element with the symbol Cl and atomic number 17. This compound is the second lightest halogen, located between fluorine and bromine in the periodic table and its properties are mostly among them. Chlorine is a yellow-green gas at room temperature. This element is a very reactive element and a strong oxidizing agent: chlorine has the highest electron affinity and the third highest electronegativity behind oxygen and fluorine.
question: What is the Chlorine Atomic Number?
answers.text: 17