Science Wiki

Ytterbium is a chemical element on the periodic table with the atomic symbol Yb, atomic number 70, and standard atomic weight 173.05 u. Classified as a Lanthanide within Group 3 and Period 6 (f-block), ytterbium possesses a ground-state electron configuration of [Xe] 4f¹⁴ 6s² distributed across 6 concentric Bohr electron shells (2 · 8 · 18 · 32 · 8 · 2) with 2 outer-shell electrons. Closed 4f¹⁴ subshell lanthanide used in optical-lattice atomic clocks stable to better than 1 second over the 13.8-billion-year age of the universe—sensitive enough to measure gravitational redshift across a 1 mm height change.

⚛️ Interactive Periodic Table Lab: Explore Ytterbium (Yb, Z = 70) in the CRV Science Dynamic Periodic Table & Bohr Orbital Lab to visualize its animated 2 · 8 · 18 · 32 · 8 · 2 electron shells, simulate live phase transitions from 0 K to 6,000 K, and compare periodic heatmaps across all 118 IUPAC elements.

Electron Shell Architecture and Ground-State Configuration

A neutral atom of ytterbium contains 70 protons in its atomic nucleus balanced by 70 electrons occupying quantized atomic orbitals. In the Bohr-Sommerfeld and quantum-mechanical orbital models, these electrons populate 6 principal energy shells (K (n=1): 2e⁻, L (n=2): 8e⁻, M (n=3): 18e⁻, N (n=4): 32e⁻, O (n=5): 8e⁻, P (n=6): 2e⁻), terminating in the seven-orbital f-subshell manifold (azimuthal quantum number l = 3) with ground-state configuration [Xe] 4f¹⁴ 6s². Removing the most loosely bound valence electron from an isolated gaseous ytterbium atom requires a first ionization energy of 603 kJ/mol, while its tendency to attract shared bonding electrons is quantified by a Pauling electronegativity of 1.10.

Periodic Table Position and Neighboring Elements

Within the periodic table, Ytterbium occupies Period 6, Group 3 of the f-block (Lanthanides). Along Period 6, it is flanked by Thulium (Tm, Z = 69) and Lutetium (Lu, Z = 71). Vertically within its periodic family, Ytterbium shares valence orbital symmetry and homologous chemical trends with Lanthanum (La), Cerium (Ce), Praseodymium (Pr), Neodymium (Nd). Learners can interactively compare Ytterbium's orbital radii, ionization energy, and Pauling electronegativity against all neighboring elements in the Dynamic Periodic Table Lab.

Standard Phase, Melting Point, and Boiling Point Dynamics

At standard ambient temperature and pressure (298.15 K / 25 °C, 1 atm), elemental ytterbium exists as a crystalline solid. As thermal energy increases, its crystal or molecular lattice undergoes solid-to-liquid fusion at a melting point of 1,097 K (+823.85 °C / +1514.9 °F) and transitions to the vapor phase at a normal boiling point of 1,469 K (+1195.85 °C / +2184.5 °F), spanning a liquid thermodynamic range of 372 K. In the CRV Science Dynamic Periodic Table, dragging the live temperature slider between absolute zero (0 K) and solar-photosphere temperatures (6,000 K) dynamically tracks Ytterbium's state transitions in real time alongside enthalpy and entropy phase equilibria.

Quantitative Atomic and Thermodynamic Parameter Matrix

Characteristic Oxidation States and Coordination Chemistry

As a 4f-block inner transition metal (rare-earth lanthanide), progressive filling of radially contracted inner 4f orbitals—shielded by outer 5s² 5p⁶ shells—produces the trivalent (+3) lanthanide contraction and sharp f–f optical and magnetic transitions. In chemical compounds, ytterbium exhibits characteristic oxidation states of +3, +2. Depending on the electronegativity difference (Δχ) of its bonding partners—such as Oxygen (χ = 3.44), Fluorine (χ = 3.98), Chlorine (χ = 3.16), Nitrogen (χ = 3.04), Carbon (χ = 2.55), or Hydrogen (χ = 2.20)—ytterbium forms redox-specific oxides, halides, hydrides, or coordination complexes governed by Gibbs free energy (ΔG = ΔH − TΔS).

Nucleosynthesis, Discovery History, and Elemental Origins

First identified or isolated in 1878, Ytterbium carries a distinct cosmological and geochemical signature. With atomic number Z = 70 beyond the iron-56 binding-energy peak, ytterbium is synthesized astrophysically via neutron-capture nucleosynthesis—combining slow neutron capture (the s-process in asymptotic giant branch stars) and rapid neutron capture (the r-process in neutron-star mergers and core-collapse supernovae).

Biochemical Classification: Abiotic / Technological / Synthetic

In comparative biochemistry and systems physiology, Ytterbium is classified as Abiotic / Technological / Synthetic. No known essential biological role; important in planetary geochemistry, astrophysics, materials science, or nuclear physics. Across terrestrial and marine ecosystems, its chemical speciation interacts with thermodynamics, enthalpy, entropy, chemistry.

Key Mechanistic Functions and Technological Uses

Closed 4f¹⁴ subshell lanthanide used in optical-lattice atomic clocks stable to better than 1 second over the 13.8-billion-year age of the universe—sensitive enough to measure gravitational redshift across a 1 mm height change. Researchers and students can further investigate Ytterbium's functional role alongside all 118 elements by launching the Interactive Periodic Table & Element Detective Lab on CRV Science Learn.

What is the electron configuration and valence shell structure of Ytterbium (Yb)?

Ytterbium (atomic number Z = 70) has the ground-state electron configuration [Xe] 4f¹⁴ 6s², distributing its 70 electrons across 6 shells as 2 · 8 · 18 · 32 · 8 · 2. Its outermost shell contains 2 electrons, placing Ytterbium in Group 3, Period 6 (f-block) as a member of the Lanthanides. You can watch these 70 electrons orbit the nucleus in real time in the Dynamic Periodic Table Bohr Lab.

What phase of matter is Ytterbium at room temperature, and when does it melt or boil?

At standard room temperature (298 K / 25 °C) and 1 atm pressure, Ytterbium is a crystalline solid. It melts at 1,097 K (+823.85 °C / +1514.9 °F) and boils at 1,469 K (+1195.85 °C / +2184.5 °F). Using the 0–6,000 K temperature slider in the Interactive Periodic Table, you can observe Ytterbium's exact solid, liquid, and gas transitions relative to all other elements.

How does Ytterbium function in biochemistry, materials science, and technology?

Closed 4f¹⁴ subshell lanthanide used in optical-lattice atomic clocks stable to better than 1 second over the 13.8-billion-year age of the universe—sensitive enough to measure gravitational redshift across a 1 mm height change. In biological systems, it is categorized under Abiotic / Technological / Synthetic, with principal oxidation states of +3, +2 and a first ionization energy of 603 kJ/mol.