Which of the following is a basic structural component of the most common mineral group?

metallic bonds
a water molecule
a carbonate ion
a sulfate ion
a silicon-oxygen tetrahedro

Silicate-Oxygen tetrahedro

Explanation:

Silicate-Oxygen tetrahedro are the most abundant and basic structure of common minerals.

These are silicate minerals which formed to silicate rock forming mineral. These  constitute about 90% of earth crust. Silica SiO2 consider as most common mineral on the surface of earth also known as Quartz. The the most andundant element in the earth crust is oxygen, mainly found in combine form.

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