what is ratio of mass of proton to electron ?
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proton mass = 1.6726219 × 10-27 kilograms


electron mass = 9.10938356 × 10-31 kilograms


Ratio of mass of proton to electron =  1.6726219 × 10-27 kilograms / 9.10938356 × 10-31 kilograms

= 1836.152676


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