Question

____ are variations in the ways atoms can be configured in a solid sample of a pure element.

answer input:
spelling counts but capitalization doesnt.

Explanation:

The term for variations in the atomic configuration of a pure element in a solid state is "allotropes". Allotropes are different structural forms of the same element in the same physical state (solid here), where atoms are arranged differently. For example, carbon has allotropes like diamond, graphite, and buckminsterfullerene, each with distinct atomic configurations.

Answer:

Allotropes