Yes, you are correct. In addition to isotopes, which are atoms of the same element with different numbers of neutrons, there is also the concept of isomers in larger atoms.
Isomers are different structural arrangements of atoms that have the same number of protons and neutrons but differ in their spatial arrangement or geometry. In other words, isomers have the same atomic number (proton number) and the same mass number but exhibit different arrangements of their constituent atoms.
Isomers can arise in complex atomic and molecular systems where there are multiple ways for the atoms to arrange themselves while maintaining the same number of protons and neutrons. This can occur due to different bonding patterns, rotational isomerism, or other structural variations.
Isomers can have different chemical and physical properties, despite having the same number of protons and neutrons, due to the distinct spatial arrangements of their atoms. This can influence factors such as stability, reactivity, and spectroscopic properties of the isomeric forms.
It's important to note that isomers are more commonly observed in larger, more complex atoms and molecules rather than simple atomic systems. The occurrence of isomers depends on the specific arrangement of the constituent atoms and the potential energy surfaces that govern their structural preferences.