Write the electron configuration (s, p, etc.) of the aluminium ion (Al³⁺). - Leaving Cert Chemistry - Question a - 2008
Question a
Write the electron configuration (s, p, etc.) of the aluminium ion (Al³⁺).
Worked Solution & Example Answer:Write the electron configuration (s, p, etc.) of the aluminium ion (Al³⁺). - Leaving Cert Chemistry - Question a - 2008
Step 1
Write the electron configuration of neutral aluminium (Al)
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Answer
Neutral aluminium has an atomic number of 13, which means it has 13 electrons. The electron configuration of Al is:
1s22s22p63s23p1
Step 2
Determine the electron configuration for Al³⁺
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Answer
The aluminium ion (Al³⁺) indicates that the aluminium atom has lost 3 electrons. These electrons are typically removed from the highest energy levels first. Therefore, we remove two electrons from the 3s subshell and one from the 3p subshell:
1s22s22p6
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