Or each set of elements represented in this periodic table outline, identify the principal quantum number, n , and the azimuthal
quantum number, ℓ , for the highest energy electrons in an atom of one of those elements.
2 answers:
The element are : <u>K, Ne, Xe, Bh and Ce</u>
<h3>Further explanation </h3>In an atom, there are energy levels in the shell and sub shell.
This energy level is expressed in terms of electron configurations.
Writing the electron configuration starts from the lowest to the highest subshell's energy level. There are 4 sub-shells in an atom's shell, namely s, p, d, and f.
Each sub-shell also has orbitals drawn in the form of a square box in which there are electrons symbolized by half arrows.
Each orbital in an atom consists of 4 quantum numbers
- n is the principal quantum number ---> describes the size of the orbitals
- l is the angular momentum / azimuthal quantum number -> describes the shape of the orbitals.
- ml, the magnetic quantum number -> describes the orientation of orbitals in space
- ms, the electron-spin quantum number ---> describes the spin of electrons
Value of n: positive integer
value of l: s = 0, p = 1, d = 2, f = 3, ... (n-1)
ml value: between -l to + l
ms value: +1/2 or -1/2
Determining the values of n and l can be obtained from the valence electrons of each element
From attached picture :
1. electron configurations of element ¹⁹K
[Ar] 4s¹ ⇒ n = 4, l = 0
2. electron configurations of element ¹⁰Ne
[He] 2s²2p⁶ ⇒ n = 2, l = 1
3. electron configurations of element ⁵⁴Xe
[Kr]4d¹⁰5s²5p⁶ ⇒ n = 5, l = 1
4. electron configurations of element ¹⁰⁷Bh
[Rn]5f¹⁴6d⁵7s²⇒ n = 7, l = 0
5. electron configurations of element ⁵⁸Ce
[Xe]4f¹5d¹6s² ⇒ n = 6, l = 0
<h3>Learn more </h3>
element X
electrons and atomic orbitals
Identify the group number in the periodic table
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Answer:
In Cl, the 2 is a subscript because it indicates there are 2 of the same elements. The Lewis structure would display it as Cl-Cl.
On the other hand, a superscript would indicate a specific charge.
All subscripts show the amount of the specific element there is.
An example would be O or N
, they both show that there are 2 of the same elements.
If the subscript is outside a parenthesis such as it indicates there are 2
molecules.