The most massive elementary particle known to exist in the universe is the top quark.
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Subatomic particles are particles that are smaller than atoms. There are two different types of subatomic particles: elementary particles and composite particles. The first subatomic particle that was discovered was the electron. It was first theorized to exist by G. Johnstone Stoney in 1874 and was confirmed to exist in 1897 by J.J. Thomson.
There are estimated to be around 1080 particles in the universe.
Scientists believe that wormholes may exist in the universe, potentially connecting different points in space and time.
Negative energy is a concept in physics that refers to a theoretical form of energy that could potentially exist in the universe. It is not yet proven to exist, but some theories suggest its presence in certain phenomena.
No, a particle in one dimension with zero speed will have zero velocity. Velocity is a vector quantity that includes both the speed and direction of motion, so if the speed is zero, the velocity will also be zero since there is no direction of motion.