Hunds rule says

Question

Hunds rule says

BlackTom AI · Accepted Answer

To begin, let’s recall the essence of Hund’s rule in atomic structure: among orbitals of the same energy (degenerate orbitals), electrons will occupy these orbitals singly with parallel spins before any orbital gets a second electron.
Option 1: 'fill across degenerate orbitals' aligns with Hund’s rule because it describes occupying each degenerate orbital one electron at a time before pairing occurs, maximizing unpaired electrons with the same spin.
Option 2: 'fill each orbital before filling across a degenerate level' describes putting two electrons into the same orbital before moving to another degenerate orbital, which contradicts Hund’s rule that favors parallel spins in separate degenerate orbitals.
Option 3: 'start filling from the highest orbital' suggests a preference for the energetically highest level first, which is the opposite of Aufbau-related reasoning and not how Hund’s rule operates; Hund’s rule concerns ordering within degenerate subshells, not skipping to high-energy orbitals.
The correct concept is that electrons occupy degenerate orbitals singly before pairing, so option 1 accurately captures Hund’s rule, while options 2 and 3 misstate the distribution principle within degenerate levels.

Hunds rule says单项选择题

类似问题

The ground state electron configuration of the nitrogen atom is A. 1s22s22px1 B. 1s22s22px1py1 C. 1s22s22px1py1pz1 D. 1s22s 2

The ground state electron configuration of the nitrogen atom is A. 1s22s22px1 B. 1s22s22px1py1 C. 1s22s22px1py1pz1 D. 1s22s 2

The ground state electron configuration of a sulphur atom (Z = 16) is?[Fill in the blank]

Which of the following is an impossible electron configuration?

Which of the following is an impossible electron configuration?

A bromine atom has 35 electrons. At its ground state, how many of these electrons are in p orbitals? (Input number only.)

The electron configuration for a ground-state sulfur atom is:

According to the Aufbau principle, which of the following orbitals should be filled first to achieve the lowest energy electronic configuration?

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单