Determine the electron arrangement for the Al 3+ ion.

Determine the electron arrangement for the aluminum ion. So aluminum neutral is an atomic number of 13, So that means it has 13 total electrons. The first shell can hold up to 2 electrons. The second shell can hold up to 8. So that accounts for 10 out of our 13 electrons. That means the 3 remaining would have to go in the 3rd shell. But here we're not dealing with aluminum atom, we're dealing with the aluminum ion. 3 plus here means we've lost 3 electrons. Remember, we lose them from the highest energy level, or in this case, highest shell number. So this is the first shell, the second shell, the third shell. So here we're gonna lose our 3 electrons from the 3rd shell, meaning that aluminum ion is just 2 dash 8 for its electron arrangement.

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1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
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2. Atoms and the Periodic Table

Ions and the Octet Rule (Simplified)

GOB Chemistry

2. Atoms and the Periodic Table

Ions and the Octet Rule (Simplified)

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Multiple Choice

Determine the electron arrangement for the Al³⁺ ion.

2-8-3

2-8-6

2-8

2-2-6

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Verified step by step guidance

Start by identifying the electron configuration of a neutral aluminum (Al) atom. Aluminum has an atomic number of 13, which means it has 13 electrons in its neutral state. The electron configuration for Al is: 1s² 2s² 2p⁶ 3s² 3p¹.

Next, consider the Al³⁺ ion. The '3+' charge indicates that the aluminum atom has lost 3 electrons. To determine the electron configuration of Al³⁺, remove 3 electrons from the outermost shell of the neutral aluminum atom.

The electrons are removed from the highest energy level first, which is the 3p and 3s orbitals. Remove the 1 electron from the 3p orbital and 2 electrons from the 3s orbital.

After removing these 3 electrons, the electron configuration for Al³⁺ becomes: 1s² 2s² 2p⁶.

Finally, translate this electron configuration into the electron arrangement format, which is based on the number of electrons in each shell. For Al³⁺, the electron arrangement is 2-8, indicating 2 electrons in the first shell and 8 electrons in the second shell.