The arrangement of or within a substance is its chemical structure.

The answer is; atoms or molecules

The chemical structure of an substance is dependent on the molecule geometry of its molecules. The molecule geometry (spatial arrangement of atoms in the molecular space) depends also on the bonding between the electronic structure of atoms that make up the compound or element. This will determine how the molecules and atoms interact with each other and how they consequently form a lattice.

a sonic boom is a loud boom that breaks the sound barrier

explanation:

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