difference between shell, energy level and orbitals

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EnglishNOOb101
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what is the difference between shell, energy level and orbitals?
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sashamashapotata
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At GCSE level, nothing really, energy levels is a term more commonly used in physics especially when talking about radioactivity. i find that in chemistry i call them orbitals and in physics energy levels but it doesnt matter unless you are told to use specific wording

but anything higher up it gets more complicted,
All electrons that have the same value for n (the principle quantum number) are in the same shell
Within a shell (same n), all electrons that share the same l (the angular momentum quantum number, or orbital shape) are in the same sub-shell
When electrons share the same n, l, and ml, we say they are in the same orbital (they have the same energy level, shape, and orientation)
So to summarize:

same n - shell
same n and l - sub-shell
same n, l, and ml - orbital
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scimus63
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Hi, I think your doing gcse and not a -level, if I am wrong I apologise.

a shell and energy level are the same thing. In gcse you use the Bohr model of the atom, this has the electrons orbiting the nucleus in shells or energy levels. Orbits are a bit like the Earth going round the Sun, its a circular orbit, same with the electrons in gcse model of the atom, they orbit the nucleus in circles. You don't need to know about orbitals till A-level. Orbitals are NOT the same as orbits! So if your doing gcse forget about orbitals till you do a-levels, just talk about orbits.
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EnglishNOOb101
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I'm doing A levels right now!
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EnglishNOOb101
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(Original post by sashamashapotata)
At GCSE level, nothing really, energy levels is a term more commonly used in physics especially when talking about radioactivity. i find that in chemistry i call them orbitals and in physics energy levels but it doesnt matter unless you are told to use specific wording

but anything higher up it gets more complicted,
All electrons that have the same value for n (the principle quantum number) are in the same shell
Within a shell (same n), all electrons that share the same l (the angular momentum quantum number, or orbital shape) are in the same sub-shell
When electrons share the same n, l, and ml, we say they are in the same orbital (they have the same energy level, shape, and orientation)
So to summarize:

same n - shell
same n and l - sub-shell
same n, l, and ml - orbital
What's l and ml?
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sashamashapotata
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(Original post by EnglishNOOb101)
What's l and ml?
Angular Momentum (Secondary, Azimunthal) Quantum Number: l
Specifies the shape of an orbital with a particular principal quantum number. The secondary
quantum number divides the shells into smaller groups of orbitals called subshells (sublevels).

Magnetic Quantum Number (ml): ml

Specifies the orientation in space of an orbital of a given energy (n) and shape (l). This
number divides the subshell into individual orbitals which hold the electrons; there are 2l+1
orbitals in each subshell. Thus the s subshell has only one orbital, the p subshell has three
orbitals, and so on.
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