The charge of an electron is minus one (-1).
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The charge of a proton is described as plus one (+1).
Canal rays are positively charged radiations, unlike the negatively charged electrons.
E. Goldstein discovered positively charged radiations called canal rays in a gas discharge, which ultimately led to the discovery of another sub-atomic particle, the proton.
Experiments investigating electricity and other phenomena provided crucial insights that guided the development of various atomic models, ultimately leading to our current understanding of atomic structure.