Reactivity & Chemical Bonding
Chemical Behavior & Oxidation States
Chlorine exhibits chemical reactivity characteristic of the nonmetal family, governed by an electronegativity of 3.16 and standard valence interactions.
Z = 17Reactive Nonmetal
Launch 3D Atom & Orbitals LabChlorine
Cl
Standard Atomic Mass: 35.453 u
Period 3Group 17P-Block
Chemical Specimen/Cl
Concentric Electron Shells3 Energy Levels
n=1: 2e⁻→
n=2: 8e⁻→
n=3: 7e⁻
Scientific Monograph • Reactive Nonmetal
3D Atom SimulatorChlorine (Cl) Scientific Profile
Chlorine (Cl) is an element with atomic number 17, classified as a nonmetal. Positioned in Period 3, Group 17, and P-block, its chemical and physical profile is defined by its electron configuration ([Ne]3s²3p⁵) and periodic trends.
Interactive Virtual Labs Available for Chlorine
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
[Ne]3s²3p⁵
Electronegativity
3.16 Pauling
Year Discovered
1774
Orbital Shells
3 Principal Levels
Orbital Block
p-block orbital
Group / Period
G: 17 • P: 3
Technological Utility
Industrial & Energy Applications
Chlorine is utilized in industrial fabrication, materials engineering, electronic manufacturing, and advanced laboratory research based on its specific thermodynamic properties.
Biological Role
Biomedical Profile & Toxicity
Chlorine 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 Chlorine are synthesized through stellar nucleosynthesis and supernovae r-processes. On Earth, Chlorine is concentrated in specific ore deposits or synthesized in nuclear accelerators.
Frequently Asked Questions about Chlorine
Q
What are the key physical and atomic properties of Chlorine?
Chlorine (Cl) has an atomic number of 17 and a standard atomic mass of 35.453 u. It is positioned in Period 3, Group 17, in the P-block, and is classified within the Reactive Nonmetal category.
Q
What is the electron configuration of Chlorine?
The ground-state electron configuration of Chlorine is [Ne]3s²3p⁵. Its 17 electrons are distributed across 3 principal energy levels (2, 8, 7).
Q
Why does Chlorine exhibit an electron configuration exception?
Chlorine 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 Chlorine?
Chlorine is utilized in industrial fabrication, materials engineering, electronic manufacturing, and advanced laboratory research based on its specific thermodynamic properties.