anonymous
  • anonymous
Explain why it is harder to remove an inner shell electron than a valence electron from an atom?
Chemistry
  • Stacey Warren - Expert brainly.com
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chestercat
  • chestercat
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Photon336
  • Photon336
@Amber1975 excellent question
Photon336
  • Photon336
To understand this we need to look at the nucleus of an atom. An atom has an nucleus that's positively charged, because protons have a positive charge while neutrons have no charge. both protons and neutrons are in the nucleus. |dw:1442690121982:dw| So far follow?
Photon336
  • Photon336
now; think of our atom like this. Opposite charges attract, right? well outside the nucleus we have electrons they are negatively charged. the positive charge of the nucleus is attracted to the negatively charged electrons

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Photon336
  • Photon336
Now look at this model |dw:1442690418805:dw|
Photon336
  • Photon336
now, you can see from this model that the shells, where our electrons are in, some are closer to the nucleus than others
Photon336
  • Photon336
|dw:1442690542866:dw|
Photon336
  • Photon336
If you notice the closer the electrons are to the nucleus they are going to be held more tightly, because they are closer to the positively charged nucleus. the valence electrons are the farthest out from the nucleus, so they are far from the positively charged nucleus .
Photon336
  • Photon336
@amber1975 We call IONIZATION ENERGY the amount of energy it takes to remove an electron from a shell. in a neutral gaseous atom. If something is farther from the nucleus, it's going to be easier to remove, require less energy, and will have a lower ionization energy than an inner core electron. Welcome to open study

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