교과서 질문
Write out the ground-state electron configurations of c. Au³⁺ ,
111
views
24. Transition Metals and Coordination Compounds
Electron Configurations of Transition Metals: Exceptions
문제 37b
교과서 질문
Specify the electron configuration for each of the following atoms and ions.
(c) Cr(III) in Cr2O42-
(d) Cr(VI) in Cr2O72-
검증된 단계별 안내1
Understand the oxidation states: Cr(III) means chromium is in the +3 oxidation state, and Cr(VI) means chromium is in the +6 oxidation state.
Determine the electron configuration of a neutral chromium atom: Chromium (Cr) has an atomic number of 24, so its electron configuration is [Ar] 3d^5 4s^1.
For Cr(III) in Cr2O4^2-: Remove 3 electrons from the neutral Cr configuration. Electrons are removed first from the 4s orbital, then from the 3d orbital.
For Cr(VI) in Cr2O7^2-: Remove 6 electrons from the neutral Cr configuration. Again, remove electrons first from the 4s orbital, then from the 3d orbital.
Write the final electron configurations for Cr(III) and Cr(VI) after removing the appropriate number of electrons.
비슷한 문제에 대한 검증된 영상 답변:이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Electron Configuration
Electron configuration describes the distribution of electrons in an atom or ion's atomic orbitals. It follows the Aufbau principle, which states that electrons fill orbitals starting from the lowest energy level to the highest. Understanding how to write electron configurations is essential for predicting chemical behavior and reactivity.
추천 영상:
가이드 코스
01:33
Electron Configuration Example
Oxidation States
Oxidation states indicate the degree of oxidation of an atom in a compound, reflecting the number of electrons lost or gained. In the case of chromium in Cr(III) and Cr(VI), the oxidation states are +3 and +6, respectively. This concept is crucial for determining the electron configuration of ions, as it affects the number of electrons present.
추천 영상:
가이드 코스
02:42Oxidation Numbers
Ionic vs. Atomic Electron Configuration
The electron configuration of ions differs from that of neutral atoms due to the loss or gain of electrons. For example, Cr(III) has lost three electrons compared to neutral chromium, while Cr(VI) has lost six. Recognizing this distinction is vital for accurately determining the electron configurations of the specified ions in the question.
추천 영상:
가이드 코스
01:33Electron Configuration Example
관련 영상
관련 실천