Reactivity & Chemical Bonding
Chemical Behavior & Oxidation States
Strontium exhibits chemical reactivity characteristic of the alkaline earth family, governed by an electronegativity of 0.95 and standard valence interactions.
Z = 38Alkaline Earth Metal
Launch 3D Atom & Orbitals LabStrontium
Sr
Standard Atomic Mass: 87.62 u
Period 5Group 2S-Block
Chemical Specimen/Sr
Concentric Electron Shells5 Energy Levels
n=1: 2e⁻→
n=2: 8e⁻→
n=3: 18e⁻→
n=4: 8e⁻→
n=5: 2e⁻
Scientific Monograph • Alkaline Earth Metal
3D Atom SimulatorStrontium (Sr) Scientific Profile
Strontium (Sr) is an element with atomic number 38, classified as a alkaline earth. Positioned in Period 5, Group 2, and S-block, its chemical and physical profile is defined by its electron configuration ([Kr]5s²) and periodic trends.
Interactive Virtual Labs Available for Strontium
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]5s²
Electronegativity
0.95 Pauling
Year Discovered
1790
Orbital Shells
5 Principal Levels
Orbital Block
s-block orbital
Group / Period
G: 2 • P: 5
Technological Utility
Industrial & Energy Applications
Strontium is utilized in industrial fabrication, materials engineering, electronic manufacturing, and advanced laboratory research based on its specific thermodynamic properties.
Biological Role
Biomedical Profile & Toxicity
Strontium 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 Strontium are synthesized through stellar nucleosynthesis and supernovae r-processes. On Earth, Strontium is concentrated in specific ore deposits or synthesized in nuclear accelerators.
Frequently Asked Questions about Strontium
Q
What are the key physical and atomic properties of Strontium?
Strontium (Sr) has an atomic number of 38 and a standard atomic mass of 87.62 u. It is positioned in Period 5, Group 2, in the S-block, and is classified within the Alkaline Earth Metal category.
Q
What is the electron configuration of Strontium?
The ground-state electron configuration of Strontium is [Kr]5s². Its 38 electrons are distributed across 5 principal energy levels (2, 8, 18, 8, 2).
Q
Why does Strontium exhibit an electron configuration exception?
Strontium 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 Strontium?
Strontium is utilized in industrial fabrication, materials engineering, electronic manufacturing, and advanced laboratory research based on its specific thermodynamic properties.