What is a repeating pattern called?

A repeating historical pattern is called "empires".

you may be referring to several different kinds of structures within a mineral... crystal structure- this type of structure is what makes diamonds and materials like silicon semiconductors and...

Ostinato

Compounds are made when atoms of 2 different elements are combined in regular forms. Repeating patterns of either atoms (one element) or molecules (2 or more elements), or perhaps ionic bonded...