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Rutherford's Discovery of the Nucleus

Physics tuition classes in Miracle Learning Centre is very beneficial. If you do not understand physics, you must definitely try the physics tuition class at Miracle Learning Centre. Let us learn about the reaction of acids and a metal carbonate in this chemistry tuition lesson.

When Ernest Rutherford was experimenting with radioactivity at the University of Manchester in 1911, atoms were generally believed to consist of large mushy blobs of positive electrical charge with electrons embedded inside — the "plum pudding" model. But when he and his assistants fired tiny positively charged projectiles, called alpha particles, at a thin foil of gold, they were surprised that a tiny percentage of them came bouncing back. It was as though bullets had ricocheted off Jell-O. Rutherford calculated that actually atoms were not so mushy after all. Most of the mass must be concentrated in a tiny core, now called the nucleus, with the electrons hovering around it. With amendments from quantum theory, this image of the atom persists today.