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CEM 141 Exam 3 Practice-Question with Correct Answers/ Verified
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Regions of space where electrons with a particular quantized energy are most likely to be found - ️️Atomic Orbitals Electrons occupy lowest level orbitals first -️️Aufbau Principle Electrons don't pair up until they have to -️️Hund's Rule Close to the nucleus -️️Core Higher in ...

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  • August 24, 2024
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  • 2024/2025
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CEM 141 Exam 3 Practice-Question with Correct Answers/ Verified
Regions of space where electrons with a particular quantized energy are most likely to be found -
✔️✔️Atomic Orbitals



Electrons occupy lowest level orbitals first - ✔️✔️Aufbau Principle



Electrons don't pair up until they have to - ✔️✔️Hund's Rule



Close to the nucleus - ✔️✔️Core



Higher in energy and far away from the nucleus - ✔️✔️Valence



Represents the state where the FORCES OF ATTRACTION between the electrons and protons are
EQUAL to the FORCES OF REPULSION between the electrons & Increases as you go DOWN and
decreases ACROSS a row - ✔️✔️Atomic Radius



Explains the attractions between the protons and electrons & the repulsions between the electrons -
✔️✔️Coulomb's Law



Tells you how many protons are attracted to the valence electrons (# of protons - # of core
electrons) & INCREASES as you go across - ✔️✔️Effective Nuclear Charge



"Hold on to their electrons" tightly because the electrons are more strongly attracted to the nucleus
- ✔️✔️Atoms with a high ENC



INCREASES as you go ACROSS (because you need more energy to remove an electron thats held
tightly to the nuclues) & DECREASES as you go DOWN - ✔️✔️Ionization energy



Because there is an exact amount of energy to send an electron out an atom, means they exist in
discrete energy levels - ✔️✔️Why are ionization energies evidence for the quantization of energy
levels in atoms?

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