General Chemistry

Matter

Question
3 out of 14

Experiments conducted with gas discharge tubes during the late 19th century resulted in many important conclusions in atomic chemistry. Among those, one of the most important was the discovery of rays known as cathode rays. Cathode rays when passed near negative plates will most likely:

 A Bend toward the negative plate B Bend away from the negative plate C Will not bend, because they are uncharged D Will not bend, because they are high energy radiations
Ans. B Gas discharge tubes are vacuum tubes with electrodes connected to very high voltages. Cathode rays are emitted from the cathode of the tube. A cathode ray consists of a beam of electrons. Since electrons are negatively charged, cathode rays will bend away from a negatively charged plate.