Positively Charged Metal Sphere: Reactivity & Capacitors

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    Charged Metal Sphere
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Discussion Overview

The discussion revolves around the behavior of a positively charged metal sphere in relation to its reactivity with elements in the air, particularly oxygen, and the implications for capacitor plates. Participants explore the theoretical and conceptual aspects of charge interactions, ion behavior, and the conditions under which reactions might occur.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants question why a positively charged metal sphere does not react with oxygen or other elements in the air, suggesting that an ion should react with surrounding elements.
  • Others argue that the gases in the air are neutrally charged, implying that there is no necessity for a reaction to occur.
  • A participant notes that if the air is very moist, there may be some leakage from the sphere, indicating a potential condition under which reactions could occur.
  • There is a suggestion that nature would not allow an ion to remain in the air without reacting, raising questions about the fundamental behavior of charged particles.
  • One participant asserts that if a capacitor were to react, it would affect the conductivity of the plates and change their mass, prompting further inquiry into the nature of ions and their behavior.
  • Another participant challenges the understanding of what an ion is, seeking clarification on the concept and its implications for the discussion.

Areas of Agreement / Disagreement

Participants express differing views on whether a positively charged sphere must react with air. While some assert that it should react, others maintain that it does not necessarily have to, leading to an unresolved debate on the topic.

Contextual Notes

There are assumptions regarding the nature of ions and the conditions under which reactions might occur, particularly concerning humidity and the properties of air. The discussion does not resolve these assumptions.

Abdullah Wahid
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When we make a metal sphere positively charged by electricity, why doesn't it react with oxygen or any other element in air as metal has positive charges and one of the element in air must react with sphere as I think an ion can never stand in air without reacting?
If it reacts, why doesn't the capacitor plates react with air??
 
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Abdullah Wahid said:
When we make a metal sphere positively charged by electricity, why doesn't it react with oxygen or any other element in air

why would it ?

gasses in the air around you is neutrally charged

Abdullah Wahid said:
why doesn't it react with oxygen or any other element in air as metal has positive charges and one of the element in air must react with sphere as I think an ion can never stand in air without reacting?
have a think and consider my previous comment, then re-ask yourself ... Why must it react ?

Abdullah Wahid said:
If it reacts, why doesn't the capacitor plates react with air??

as you have now discovered ... it doesn't

Caveat ... if the air around the sphere is very moist ( high humidity) there will possibly/probably be some leakage from the sphere
and probably mainly down the pole/other thing that is supporting the sphereDave
 
davenn said:
why would it ?

gasses in the air around you is neutrally charged
have a think and consider my previous comment, then re-ask yourself ... Why must it react ?
as you have now discovered ... it doesn't

Caveat ... if the air around the sphere is very moist ( high humidity) there will possibly/probably be some leakage from the sphere
and probably mainly down the pole/other thing that is supporting the sphereDave

Actually i think that nature will never allow an ion to stay in air without reacting. As charges are present it must react with something , probably with air as air has surrounded it and air also have some moisture in it.
If capacitor reacts, conductivity of plates should be effected as new compund is formed and mass of plates must change. Isn't it??
 
Abdullah Wahid said:
Actually i think that nature will never allow an ion to stay in air without reacting. As charges are present it must react with something ,

I have a feeling you don't know what an ion is ?

describe to me what you think it is :smile:

Abdullah Wahid said:
If capacitor reacts, conductivity of plates should be effected as new compound is formed and mass of plates must change. Isn't it??

no
 
davenn said:
I have a feeling you don't know what an ion is ?

describe to me what you think it is :smile:
no
Ion is an atom with net charge due to gain or loss of electrons. When sphere is charged positively, it has lesser electrons than what it had in neutral state, so this means some atoms must habe lost their valance electons.
Isn't it true
 

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