Q: A point defect can be an atom missing from a site in the crystal known as a what? Read this paragraph and choose the correct option from the provided answers: Summary Real crystals contain large numbers of defects. Defects may affect only a single point in the lattice (a point defect), a row of lattice points (a line defect), or a plane of atoms (a plane defect). A point defect can be an atom missing from a site in the crystal (a vacancy) or an impurity atom that occupies. Choices: - void - deficiency - vacuum - vacancy A:
vacancy