Assertion: proton's charge | /r/HasProperty | to be equal
Facets:
value: approximately
type: DEGREE
Source sentences:
text: In 1911, Ernest Rutherford gave a model of the atom in which a central nucleus held most of the atom's mass and a positive charge which, in units of the electron's charge, was to be approximately equal to half of the atom's atomic weight, expressed in numbers of hydrogen atoms.