Atomic Number & Orbital Energy: Explained

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Discussion Overview

The discussion revolves around the relationship between atomic number, orbital energy, and binding energy in the context of atomic structure. Participants explore concepts related to the attractive forces between electrons and the nucleus, as well as the implications of these forces on energy levels.

Discussion Character

  • Conceptual clarification
  • Technical explanation
  • Homework-related

Main Points Raised

  • One participant notes that an increase in nuclear charge leads to a greater attractive force on outer shell electrons, which they interpret as a decrease in the energy of interaction (more negative orbital energy).
  • Another participant agrees, stating that a more attractive potential results in a decrease in binding energy, emphasizing that binding energy is negative and its decrease corresponds to an increase in magnitude.
  • A third participant expresses confusion about the concepts of potential and binding energy, indicating a lack of understanding of these terms.
  • A later reply attempts to clarify potential energy as energy stored due to position and binding energy as the energy needed to separate a system into its parts, providing a general explanation of energy.

Areas of Agreement / Disagreement

The discussion shows some agreement on the relationship between attractive forces and energy levels, but there is a lack of consensus on the definitions and implications of potential and binding energy, particularly from less experienced participants.

Contextual Notes

Some participants express uncertainty about fundamental concepts, indicating a potential gap in foundational knowledge that may affect their understanding of the discussion.

Who May Find This Useful

This discussion may be useful for students learning about atomic structure, particularly those seeking clarification on the concepts of potential and binding energy in relation to atomic number.

kay
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My book here says that ' Despite the shielding of the outer electrons from the nucleus by the inner shell electrons, the attractive force experienced by the outer shell electrons increases with increase of nuclear charge. In other words, the energy of interaction between the nucleus and electron (that is orbital energy) decreases (that is more negative) with the increase of atomic number. '
Now i understood the first part. But whatever is said after 'in other words', i am not able to understand what is said here.
How is more attractive force synonymous to decrease of energy of interaction b/w nucleus and electron?
 
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Yes, if your potential is more attractive you binding energy will decrease. You must keep in mind that the binding energy is negative, hence it's decrease it's actually associated with the increase of its magnitude.
 
I could not get you. :|
Idk what is potential or binding energy.
PS- I'm just a student of 11th grade.
 
kay said:
Idk what is potential or binding energy.

Potential energy is the stored energy in a system by virtue of its position. For example an apple sitting on a table has energy by virtue of the fact it is above the floor. Remove the table and it falls to the floor converting the potential energy to kinetic energy.

Binding energy is the energy required to dissemble a system into its constituent parts.

It's also probably a good idea to become familiar with what energy is in a general sense:
http://physwiki.ucdavis.edu/Classic..._Mass_and_Energy/Noether's_Theorem_for_Energy

Thanks
Bill
 

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