In the Bohr model, electrons circle the nucleus only in allowed paths.
The quantum mechanical model represents electrons in three-dimensional areas around the nucleus.
Bohr’s allowed paths contrast with the quantum model’s three-dimensional electron regions.
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Further detail
The first subshell, 1s, has the lowest energy and contains one spherical orbital.
The second energy shell has two subshells, labeled s and p.
1. An atomic diagram uses the Bohr model to show an electron around the nucleus. Which arrangement is consistent with this model?
2. A scientist replaces a Bohr-style diagram with the quantum mechanical model. How does the new model represent where electrons are located?
3. A student is assigning electrons to orbitals and has already placed two electrons in one orbital. How many additional electrons can be placed in that same orbital?
In the Bohr model, where may electrons circle the nucleus?
Only in allowed paths.
How does the quantum mechanical model represent electrons around the nucleus?
As three-dimensional areas.
How many electrons can one orbital hold at most?
Two electrons.
Which subshell has the lowest energy and contains one spherical orbital?
The 1s subshell.
Which electrons determine an atom’s chemical properties?
Valence electrons.
What property patterns organize elements into periodic-table rows and columns?
Patterns in metallic or nonmetallic character, physical state, and reactivity.
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