Textbook Question
How many electrons does an atom of each of the following elements need to gain to achieve a noble gas configuration? By gaining that many electrons, which noble gas configuration is achieved?
(b) Iodine
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1. A Review of General Chemistry
Atomic Structure
Multiple Choice
PRACTICE: Determine which of the three principles of electron configuration is being broken in the electron diagrams below.
A
Hund's Rule
B
Aufbau Principle
C
Pauli Exclusion Principle
Verified step by step guidance1
Examine the electron configuration diagram provided. Notice the distribution of electrons in the 2p orbitals.
Identify the three principles of electron configuration: Hund's Rule, the Aufbau Principle, and the Pauli Exclusion Principle.
Hund's Rule states that every orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied. Check if this rule is being followed in the 2p orbitals.
The Aufbau Principle states that electrons fill lower energy orbitals first before moving to higher energy orbitals. Verify if the electrons are filling the orbitals in the correct order of increasing energy.
The Pauli Exclusion Principle states that no two electrons in the same atom can have identical quantum numbers, meaning an orbital can hold a maximum of two electrons with opposite spins. Ensure that this principle is not violated in the diagram.
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