why is the charge of an electron called unit negative charge?

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Solution

Dear Student,

It is an assumption made by scientists.They assumed charge on all electrons to be one unit negative and that on the protons is one unit positive.
Charge on an electron = 1.6 x 10^-19 C

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why is the charge of an electron called unit negative charge?

Dear Student, It is an assumption made by scientists.They assumed charge on all electrons to be one unit negative and that on the protons is one unit positive. Charge on an electron = 1.6 x 10-19 C

Dear Student,

It is an assumption made by scientists.They assumed charge on all electrons to be one unit negative and that on the protons is one unit positive.
Charge on an electron = 1.6 x 10^-19 C