Pure ice is classified as a compound. This is because it is composed entirely of water molecules (H2O), which are formed from the chemical combination of hydrogen and oxygen in a fixed ratio. Unlike mixtures that consist of two or more substances that can be separated by physical means, or elements that cannot be broken down into simpler substances, pure ice has a consistent chemical structure and properties throughout. Therefore, in its purest form, ice is not just a collection of water, but rather a specific chemical compound that demonstrates the characteristics of solid water.
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