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Atomic theory does not really refer to electrons---indeed, when it was first created they did not even know electrons existed, and the modern reinterpretation of its postulates (in light of our knowledge of subatomic particles, fission, fusion, and isotopes) does not talk specifically about electrons either. Now based on your question, I presume that what you are looking for is that we cannot know both the position and momentum of an electron simultaneously. This is the application of Heisenburg's uncertainty principle to electrons. It is the reason why we talk about the location of electrons in terms of probabilities of finding them somewhere within the region of space defined by orbitals.

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15y ago
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13y ago

scientists can only figure very limited things about electrons eg. how many protons electrons and neutrons there are in each atom but we cannot see the atoms even with an electron microscopeso technically isotopes ions bonds and compounds are the main things unless you are in university or past grade 11

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7y ago

position and speed

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Q: What are the 2 things about an electron that you cannot know exactly?
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