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Question
α particles used in Rutherford's experiments are heavy
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Solution
The correct option is A positively charged
Alpha particle consists of two neutrons and two protons, and is thus identical to the nucleus of a helium atom. The rest mass of the alpha particle amounts to 4 a.m.u which equals to about 6.644×10−27 kg and its charge is +2e i.e. twice of a proton
Alpha particle consists of two neutrons and two protons, and is thus identical to the nucleus of a helium atom. The rest mass of the alpha particle amounts to 4 a.m.u which equals to about 6.644×10−27 kg and its charge is +2e i.e. twice of a proton