Why electron have negative charge?

Answer 1

Understanding that this question is the same as asking "why do we have one moon?" or "why does hydrogen have one proton" might help you reconsider what it is you are trying to ask. It is what it is. Asking "why" is a philosophical question to which no one would know the answer...

Here i just wana say that as we know that a proton and a neurtron can be further subdivided into quarks which are the building blocks of hadrons(i.e Proton and neutron etc), there are six quarks ,however a proton is made of only 3 quarks , two up quarks and one down quark..

value for up quark is 2/3

for down quark value is -1/3

so mathematically,

2/3*2 = 4/3

4/3-1/3=3/3= 1 a positive plus charge on proton

FOR neutron same process as above..

but for an electron we cant calculate it in the way like for proton and neutron.

so we have to just accept it in the way as it is..just like some planets of our universe are big and some are small..so we cant say that why these are...

however Quantam mechanics is still on working for this...REGARDS

Answer 2

That's purely arbitrary, When electricity was first being understood they had to pick a "direction" for current to flow. They guessed wrong.