Experiment shows most alpha particles went straight through foil, some were deflected through a small angle, few were deflected back towards the source. It was concluded that each gold atom has a small, dense positively charged nucleus. Explain why.
1 Most alpha particles went through = mainly empty space - compared to size of atom, nucleus is v. small. Small angle deflection: +alpha particles passes close to +nucleus & is repelled because like charges repel. 3 deflected back:nucleus met head on
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