Reactivity & Chemical Bonding
Chemical Behavior & Oxidation States
Iodine exhibits chemical reactivity characteristic of the nonmetal family, governed by an electronegativity of 2.66 and standard valence interactions.
Z = 53Reactive Nonmetal
Launch 3D Atom & Orbitals LabIodine
I
Standard Atomic Mass: 126.9 u
Period 5Group 17P-Block
Chemical Specimen/I
Concentric Electron Shells5 Energy Levels
n=1: 2e⁻→
n=2: 8e⁻→
n=3: 18e⁻→
n=4: 18e⁻→
n=5: 7e⁻
Scientific Monograph • Reactive Nonmetal
3D Atom SimulatorIodine (I) Scientific Profile
Iodine (I) is an element with atomic number 53, classified as a nonmetal. Positioned in Period 5, Group 17, and P-block, its chemical and physical profile is defined by its electron configuration ([Kr]4d¹⁰5s²5p⁵) and periodic trends.
Interactive Virtual Labs Available for Iodine
3D Orbitals & Valence Lab
Simulate concentric quantum energy levels, observe valence electron spins, and examine live atomic clouds in full 3D.
Electronic Configuration Lab
Experiment with Aufbau subshell ordering, explore orbital occupancy, and analyze quantum configuration exceptions.
Electron Config
[Kr]4d¹⁰5s²5p⁵
Electronegativity
2.66 Pauling
Year Discovered
1811
Orbital Shells
5 Principal Levels
Orbital Block
p-block orbital
Group / Period
G: 17 • P: 5
Technological Utility
Industrial & Energy Applications
Iodine is utilized in industrial fabrication, materials engineering, electronic manufacturing, and advanced laboratory research based on its specific thermodynamic properties.
Biological Role
Biomedical Profile & Toxicity
Iodine does not play a prominent biological role in human biochemistry, existing primarily as a trace element or mineral component in natural ecosystems.
Geochemistry & Abundance
Cosmic & Terrestrial Occurrence
Elements like Iodine are synthesized through stellar nucleosynthesis and supernovae r-processes. On Earth, Iodine is concentrated in specific ore deposits or synthesized in nuclear accelerators.
Frequently Asked Questions about Iodine
Q
What are the key physical and atomic properties of Iodine?
Iodine (I) has an atomic number of 53 and a standard atomic mass of 126.9 u. It is positioned in Period 5, Group 17, in the P-block, and is classified within the Reactive Nonmetal category.
Q
What is the electron configuration of Iodine?
The ground-state electron configuration of Iodine is [Kr]4d¹⁰5s²5p⁵. Its 53 electrons are distributed across 5 principal energy levels (2, 8, 18, 18, 7).
Q
Why does Iodine exhibit an electron configuration exception?
Iodine follows standard Aufbau principle orbital filling. Transition metals and heavy elements optimize their shell filling based on subshell exchange energy and electrostatic stability.
Q
What are the primary commercial and laboratory uses of Iodine?
Iodine is utilized in industrial fabrication, materials engineering, electronic manufacturing, and advanced laboratory research based on its specific thermodynamic properties.