Reactivity & Chemical Bonding
Chemical Behavior & Oxidation States
Lawrencium exhibits chemical reactivity characteristic of the actinide family, governed by an electronegativity of 1.3 and standard valence interactions.
Z = 103Actinide
Launch 3D Atom & Orbitals LabLawrencium
Lr
Standard Atomic Mass: 262 u
Period 7Group 3D-Block
Chemical Specimen/Lr
Concentric Electron Shells7 Energy Levels
n=1: 2e⁻→
n=2: 8e⁻→
n=3: 18e⁻→
n=4: 32e⁻→
n=5: 32e⁻→
n=6: 9e⁻→
n=7: 2e⁻
Scientific Monograph • Actinide
3D Atom SimulatorLawrencium (Lr) Scientific Profile
Lawrencium (Lr) is an element with atomic number 103, classified as a actinide. Positioned in Period 7, Group 3, and D-block, its chemical and physical profile is defined by its electron configuration ([Rn]5f¹⁴7s²7p¹) and periodic trends.
Interactive Virtual Labs Available for Lawrencium
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
[Rn]5f¹⁴7s²7p¹
Electronegativity
1.3 Pauling
Year Discovered
1961
Orbital Shells
7 Principal Levels
Orbital Block
d-block orbital
Group / Period
G: 3 • P: 7
Technological Utility
Industrial & Energy Applications
Lawrencium is utilized in industrial fabrication, materials engineering, electronic manufacturing, and advanced laboratory research based on its specific thermodynamic properties.
Biological Role
Biomedical Profile & Toxicity
Lawrencium 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 Lawrencium are synthesized through stellar nucleosynthesis and supernovae r-processes. On Earth, Lawrencium is concentrated in specific ore deposits or synthesized in nuclear accelerators.
Frequently Asked Questions about Lawrencium
Q
What are the key physical and atomic properties of Lawrencium?
Lawrencium (Lr) has an atomic number of 103 and a standard atomic mass of 262 u. It is positioned in Period 7, Group 3, in the D-block, and is classified within the Actinide category.
Q
What is the electron configuration of Lawrencium?
The ground-state electron configuration of Lawrencium is [Rn]5f¹⁴7s²7p¹. Its 103 electrons are distributed across 7 principal energy levels (2, 8, 18, 32, 32, 9, 2).
Q
Why does Lawrencium exhibit an electron configuration exception?
Lawrencium 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 Lawrencium?
Lawrencium is utilized in industrial fabrication, materials engineering, electronic manufacturing, and advanced laboratory research based on its specific thermodynamic properties.