Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Problem:Passage: The following ideas are important in understanding hybridization: 1. Hybrid orbitals do not exist in isolated atoms. They are formed only in covalently bonded atoms. Hybrid orbitals have shapes and orientations that are very different from those of the atomic orbitals in isolated. Answer: covalently
Solution:
Hybrid orbitals are formed only in which type of bonded atoms?