is the electron a positive charge or a negative charge or is it neutral?
Negative charge
Electron
The electron is a subatomic particle, symbol or , whose electric charge is negative one elementary charge. 
what is the exact mass of an electron Approximately 1/1836 that of the proton
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Electron [SEP] Introduction
The electron is a subatomic particle, symbol or , whose electric charge is negative one elementary charge. Electrons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have no known components or substructure. The electron has a mass that is approximately 1/1836 that of the proton. Quantum mechanical properties of the electron include an intrinsic angular momentum (spin) of a half-integer value, expressed in units of the reduced Planck constant, "ħ". Being fermions, no two electrons can occupy the same quantum state, in accordance with the Pauli exclusion principle.