Assertion: hydrogen atom's electron | /r/HasProperty | discovered
Facets:
Source sentences:
text: The electron was discovered and identified as the smallest quantity of electric charge by J.J. Thomson in 1897 in his cathode ray experiments, also known as β-ray experiments: A β-ray is a beam of electrons.
text: The electron was discovered and identified as the smallest quantity of electric charge by J.J. Thomson in 1897 in his cathode ray experiments, also known as β-ray experiments: A β-ray is a beam of electrons.
text: The electron was discovered and identified as the smallest quantity of electric charge by J.J. Thomson in 1897 in his cathode ray experiments, also known as β-ray experiments: A β-ray is a beam of electrons.