In a(n) ___, the particles form a regular, repeating pattern. Answerlist: viscous liquid

melting liquid
amorphous solid
or crystalline solid

You had best do some reading of your text.

crystalline solid

crystal solid

so is it crystal solid

The correct answer is a crystalline solid.

To understand why, let's break down the options and their definitions:

1. Viscous liquid: Viscosity refers to a fluid's resistance to flow or its thickness. While viscous liquids may have a consistent molecular arrangement on a microscopic level, they lack the regular, repeating pattern characteristic of a crystalline solid.

2. Melting liquid: This term doesn't exist in scientific terminology. When a solid undergoes melting, it transitions into a liquid state.

3. Amorphous solid: Amorphous solids, such as glass, lack a well-defined, long-range order of the particles. Their atomic/molecular arrangement is more random and disordered, without a repeating pattern.

4. Crystalline solid: A crystalline solid is characterized by a highly ordered arrangement of atoms, ions, or molecules in a repeating pattern throughout the entire substance. This repeating pattern is called a crystal lattice and gives rise to the external shape and internal structure of the solid.

Based on the definitions, a crystalline solid best fits the description of having particles arranged in a regular, repeating pattern.