Reactivity & Chemical Bonding
Chemical Behavior & Oxidation States
Technetium exhibits chemical reactivity characteristic of the transition metal family, governed by an electronegativity of 1.9 and standard valence interactions.
Z = 43Transition Metal
Launch 3D Atom & Orbitals LabTechnetium
Tc
Standard Atomic Mass: 98 u
Period 5Group 7D-Block
Chemical Specimen/Tc
Concentric Electron Shells5 Energy Levels
n=1: 2e⁻→
n=2: 8e⁻→
n=3: 18e⁻→
n=4: 13e⁻→
n=5: 2e⁻
Scientific Monograph • Transition Metal
3D Atom SimulatorTechnetium (Tc) Scientific Profile
Technetium (Tc) is an element with atomic number 43, classified as a transition metal. Positioned in Period 5, Group 7, and D-block, its chemical and physical profile is defined by its electron configuration ([Kr]4d⁵5s²) and periodic trends.
Interactive Virtual Labs Available for Technetium
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]4d⁵5s²
Electronegativity
1.9 Pauling
Year Discovered
1937
Orbital Shells
5 Principal Levels
Orbital Block
d-block orbital
Group / Period
G: 7 • P: 5
Technological Utility
Industrial & Energy Applications
Technetium is utilized in industrial fabrication, materials engineering, electronic manufacturing, and advanced laboratory research based on its specific thermodynamic properties.
Biological Role
Biomedical Profile & Toxicity
Technetium 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 Technetium are synthesized through stellar nucleosynthesis and supernovae r-processes. On Earth, Technetium is concentrated in specific ore deposits or synthesized in nuclear accelerators.
Frequently Asked Questions about Technetium
Q
What are the key physical and atomic properties of Technetium?
Technetium (Tc) has an atomic number of 43 and a standard atomic mass of 98 u. It is positioned in Period 5, Group 7, in the D-block, and is classified within the Transition Metal category.
Q
What is the electron configuration of Technetium?
The ground-state electron configuration of Technetium is [Kr]4d⁵5s². Its 43 electrons are distributed across 5 principal energy levels (2, 8, 18, 13, 2).
Q
Why does Technetium exhibit an electron configuration exception?
Technetium 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 Technetium?
Technetium is utilized in industrial fabrication, materials engineering, electronic manufacturing, and advanced laboratory research based on its specific thermodynamic properties.