Molecules in solids are strongly attracted to one another and this characteristic is called:

The characteristic of molecules in solids being strongly attracted to one another is referred to as cohesion. Cohesion is the intermolecular force that occurs between molecules of the same substance, resulting in a strong attraction. This property is what gives solids their fixed shape and volume, as the molecules are held closely together and cannot move freely.

In solids, these cohesive forces are particularly strong compared to liquids and gases, contributing to the structural integrity and stability of solid materials. Cohesion is crucial in various applications in millwrighting, such as ensuring the strength and durability of assembled mechanical parts.

The other choices describe different concepts: adhesion refers to the attraction between different substances or materials, mass relates to the amount of matter in an object, and elements refer to the basic building blocks of matter. Understanding these distinctions helps clarify the significance of cohesion in materials science and its relevance in practical applications.