Aparticle called the pi-meson is made from an up quark and an antidown quark. what is the charge of this particle?

Positive Pion, Negative Pion and Neutral Pion

Explanation:  

Pi-meson or also known as pion is one of any of the three (3) subatomic particles which characterizes of being unstable of its nature. The charged pions  

π+

and  

π−

decay with a mean lifetime of 26.033 nanoseconds or 2.6033×10−8 seconds, and the neutral pion  

π0

decays with a mean lifetime of 84 attoseconds (8.4×10−17 seconds).

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