Yes, different particles can exist as both matter and antimatter. In particle physics, every particle has an antiparticle with the same mass but opposite charge. When a particle and its corresponding antiparticle meet, they can annihilate each other, releasing energy in the process.
For example, the electron is a particle that carries a negative charge, and its antiparticle is called the positron, which carries a positive charge. The electron and positron have the same mass, but opposite charges. When an electron and a positron collide, they can annihilate each other, producing energy in the form of photons.
Similarly, protons, which carry a positive charge, have antiparticles called antiprotons, which carry a negative charge. Neutrons, which have no charge, have antiparticles called antineutrons, also with no charge.
It's worth noting that not all particles have antiparticles that are stable and long-lived. Some particles, such as neutrinos, are their own antiparticles, meaning that they are neither matter nor antimatter in the traditional sense. Additionally, certain particles, like photons (particles of light), are their own antiparticles and can exist independently without annihilating.
In summary, particles and their corresponding antiparticles can coexist, but when they come into contact, they can annihilate each other, releasing energy.