Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Problem:Passage: Halogens have filled valence electron configurations. Halogens tend to form salts with metals. As the free elements, halogens are monatomic. Halogens have appreciable nonmetallic character. Halogens tend to have an oxidation state of 1. Halogens are good reductants. Answer: metals
Solution:
Halogens tend to form salts with what type of element?