Yes, it is possible to have more than one atom. In fact, the vast majority of matter in the universe consists of collections of multiple atoms bonded together. Atoms are the basic building blocks of matter and are composed of a nucleus containing protons and neutrons, surrounded by electrons. When atoms combine, they form molecules, which can contain two or more atoms bonded together.
Molecules can be simple, such as oxygen (O2), which consists of two oxygen atoms bonded together, or more complex, like water (H2O), which consists of two hydrogen atoms bonded to one oxygen atom. There are countless combinations and arrangements of atoms that can form molecules with different properties and characteristics.
Furthermore, atoms can also combine in structures beyond molecules. For example, in a crystal lattice, atoms are arranged in a repeating pattern to form a solid structure, as seen in common substances like salt (NaCl) or diamond (carbon). These structures can involve large numbers of atoms arranged in intricate patterns.
So, whether it's a simple molecule or a complex crystal, the combination of multiple atoms is fundamental to the formation of matter as we know it.