What technique did Thomson and Francis William Aston use to determine the nature of positively charged particles?
Mass spectrometry
X-ray diffraction
Electron microscopy
Nuclear magnetic resonance
Answer
J.J. Thomson and Francis William Aston used mass spectrometry to determine the nature of positively charged particles. Their experiments marked the first use of mass spectrometry and led to the development of the mass spectrograph, a crucial tool in modern chemistry and physics.
Unlocking the Secrets of the Atom: The J.J. Thomson Chronicles!