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Question:

i have a few questions about rutherford's gold-foil experiment?

1) what was the significance of using gold foil in particular? why not tin foil or aluminum foil?2) the whole experiment confuses mei know that most particles passed through the foil but some were deflectedthats cuz those particles approached the nucleus closely are deflectedso does that mean the nucleus in the particles approached the nucleuses in the gold foil and thats why they were deflected? can u explain this to me?3) what r alpha particles?thanks guys

Answer:

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The primary reason for using gold foil is because it is malleable to such an extent that it can be pounded to a thinness that allows particles to pass throughTin, aluminum, etcare also very malleable, but cannot achieve the same levels of thinness.easily or at allAlphas are positively charged particles, so when some of them would get close enough to a nucleus of Au, the positive charge of a nucleus would repel them, causing a deflection incidentYes still most past through, but the amount being deflected was so significant and the fact that they had been deflected caused Rutherford to remark it was as if you fired a 15-inch shell at a piece of tissue paper and it came back and hit youAlpha particles are composed of two protons and two neutronsThis makes the overall charge 2+A reminder is that they are simply the nucleus of Helium atoms.

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