Question

Compare the mass number of a neutral hydrogen atom and a hydrogen ion with a negative charge. What do you notice? Why do you think this is?

Answer 1

Explanation:

Atomic number, mass number, and isotopes (video)

Khan Academy · Khan Academy Organic Chemistry

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Answer 2

Answer:

Explanation:

Protons are tightly bound in the nucleus and can be neither gained nor loss. So any change in the charge of an atom is due to changes in its electron count. If a neutral atom gains electrons, then it will become negatively charged. If a neutral atom loses electrons, then it become positively charged.

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