CH111 Lecture Notes - Lecture 19: Henri Becquerel, Strong Interaction, Thorium
25 Dec 2018
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Document Summary
Neutrons and protons in the nucleus are held together by strong force. Strong force is able to overcome strong electric repulsion of protons, which is why they do not repel each other. Atoms often changed into atoms of be rearranged or ionized new element. Rate not normally affected by temperature, pressure, temperature, pressure, or catalysts concentration, and catalysts. Classify this chemical reaction as nuclear or chemical. Two atoms share electrons to form a bond chemical. A sample of pure sulfur releases heat as it slowly cools neither. In 1895, he discovered invisible rays emitted when electrons bombarded surface of certain materials . He discovered that a uranium salt, k2uo2(so4)2 darkened photographic plates even when not exposed to light. Marie named the process by which materials give off such rays radioactivity and emitted rays and particles radiation. She also developed a device to measure radioactivity. She and her husband also discovered two radioactive elements polonium and radium.
