Question

Mass of an electron is compared with which atom
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Answer 1

Answer:

Although similar in mass, protons are positively charged, while neutrons have no charge. Therefore, the number of neutrons in an atom contributes significantly to its mass, but not to its charge. Electrons are much smaller in mass than protons, weighing only 9.11 × 10-28 grams, or about 1/1800 of an atomic mass unit

Explanation:

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Answer 2

Answer:

Hydrogen

Hydrogen is the only element which contains only protons in the atomic nucleus while in all other elements at least half of the atomic masses is contributed by neutrons. So the number of electrons per mass is highest in hydrogen.