instruction:
Given a scientific passage and an answer, generate a question for the given answer.
question:
Passage: The two materials do have at least one thing in common. The atoms in the materials are held together by covalent bonds. These bonds consist of electrons shared between two or more atoms. Unlike ionic bonds, where electrons are either lost or gained by an atom to form charged ions, electrons in covalent compounds are shared between the two atoms, giving rise to properties that are quite different from those seen in ionic materials. Answer: ionic bonds
answer:
Electrons in covalent compounds are shared between the two atoms, unlike the case in what type of bonds?

question:
Passage: Cloud types include cirrus, stratus, and cumulus. Answer: clouds
answer:
Cirrus, stratus, and cumulus are types of what?

question:
Passage: An atom's protons and electrons carry electrical charges. Protons, with their positive charge, are designated p+. Electrons, which have a negative charge, are designated e. An atom's neutrons have no charge: they are electrically neutral. Just as a magnet sticks to a steel refrigerator because their opposite charges attract, the positively charged protons attract the negatively charged electrons. This mutual attraction gives the atom some structural stability. The attraction by the positively charged nucleus helps keep electrons from straying far. The number of protons and electrons within a neutral atom are equal, thus, the atom's overall charge is balanced. Answer: neutrons
answer:
What part of an atom is electrically neutral?