1s2, 2s2, 2p6, 3s2, 3p6, 3d7, 4s2 An element with the electronic configuration above is a

Assessment: JAMB UTME - Chemistry - 1999 Subject: Chemistry

Question 1 Report

1s2, 2s2, 2p6, 3s2, 3p6, 3d7, 4s2

An element with the electronic configuration above is a

Answer Details
The electronic configuration given in the question represents an atom with 26 electrons. To determine the identity of the element, we can count the number of electrons in each energy level and sub-level. The highest energy level, 4, has 2 electrons in the s sub-level and 0 electrons in the d sub-level, which means that it is a Group 2 element. The 3d sub-level has 7 electrons, which confirms that the element is a transition element. Therefore, the correct answer is "transition element."
Read lesson note on Atomic Structure And Bonding (JAMB)
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