All compounds containing carbon are organic.
a. true
b. false

False, not all compounds containing carbon is organic rather all organic compounds contain carbon and hydrogen. Some compounds containing carbon are considered to be inorganic like carbon dioxide, carbon tetrachloride and sodium bicarbonate.

Cathode ray tubes became the only instrument of use in the study of atoms. By comparing the deflection of a beam of cathode rays by electric and magnetic fields he obtained more robust measurements of the mass to charge ratio that confirmed his previous estimates. This became the classic means of measuring the charge and mass of the electron.