A neutral aluminum atom has 13 electrons. However, an aluminum ion has a greater or fewer number of electrons, and is therefore positively or negatively charged.
ms = +1/2
The electron configuration for aluminum atoms, which is 1s22s22p63s23p1.
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For the electron configuration of aluminum see the link below.
The stable ion of aluminum is Al 3+, which means it has three fewer electrons. The aluminum atom has shed its outer shell of 3s2 3p1 and has an electron configuration equal to that of Neon, or 1s2 2s2 2p6.
Aluminum has 3 valence electrons
n=3
ms = +1/2
ms = +1/2
The electron configuration for aluminum atoms, which is 1s22s22p63s23p1.
The electron configuration of aluminum is [Ne]3s23p1.
The electronic configuration for aluminum is 1s22s22p63s23p1 .
ms = +1/2
The element aluminum (atomic number 13) has the electron configuration [Ne] 3s2 3p1 which is completely expressed by 1s2 2s2 2p6 3s2 3p1
Nickel has the atomic number 28 so it has the electron configuration 1s22s22p63s23p64s23d8 .
Aluminum is on the 3rd row, 3rd column of the periodic table, so its 1st and 2nd shells are full, and 3 electrons are in the third shell. The configuration is: 1s22s22p63s23p1.
n = 3