Which one of the following represents the configuration of the three electrons with highest energy for the ground stale of an element in Group III?
Correct answer: D. 4s² 4p¹
- A. 1s¹ 2s¹ 2p¹
- B. 2s¹ 2p²
- C. 3p³
- D. 4s² 4p¹
Explanation
The correct answer is 4s² 4p¹, which corresponds to gallium (Ga), a Group III element. In this configuration, the three electrons with the highest energy are in the 4s and 4p orbitals, reflecting the typical electron distribution for elements in this group. The other options represent configurations that either belong to elements in different groups or configurations that do not reflect the highest energy electrons for a Group III element.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Electronic Configuration
Electronic configuration describes how electrons occupy shells, subshells and orbitals around an atom. Questions use the Aufbau principle, Pauli exclusion principle and Hund's rule to write configurations, identify valence electrons, form ions and explain periodic trends, including common exceptions such as chromium and copper.
Practise Atomic Structure
922 free Atomic Structure MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electronic Configuration questions
Sodium-11 has an electronic configuration
An atom X has a stable ion that is tri-positive.The electronic configuration of the ion is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d³. The atomic number & correct electronic configuration of element X is
The electronic configuration of carbon in excited state may be represented by:
What is the electron configuration of Ga3+ ion
Nitrogen has three unpaired electrons because of:
The filling of 4s orbital before 3d orbital is due to: