Light is currently considered to be the fastest known particle(s) in existence. There are theoretical particles that can function well past the speed of light. One example of such theoretical particle is the Tachyon.
Now the term negatron is not used; in the past was rarely used to name an electron or an antiproton.
Subatomic particle
A colloid is not a subatomic particle.
A quark is the smallest particle in matter.
Past is : Beat (itself) Past Particle : Beaten
The past tense of "get" is "got," and the past participle is "gotten." In American English, "gotten" is often used as the past participle, while in British English, "got" is commonly used as both the past tense and past participle.
The simple past and past participle is had.
"Encouraged" is the simple past and past participle of the verb "encourage".
The past participle of do is 'done'.
The past participle is burst.
The past participle is drawn.
The past participle of "go" is "gone."
The past tense of "lose" is "lost," and the past participle is also "lost."
Been
The past participle (and simple past) is loved.
The past tense is took. The past participle is taken.