Atomic Number
44
Element 44
Ruthenium (Ru)
Ruthenium is a chemical element with symbol Ru and atomic number 44. It is a rare transition metal belonging to the platinum group of the periodic table.
Atomic Mass
101.07 u
Category
Transition Metal
Period
5
Group
Group 8: iron group
Phase
solid
Density
12.45 g/cm3
Electron Shells
2, 8, 18, 15, 1
Atomic Structure
Protons: 44. Electrons: 44. Neutrons: Varies by isotope.
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s¹ 4d⁷
Why Ruthenium Matters
Ruthenium helps connect atomic number 44, transition metal behavior, period 5 trends, and electron shell structure. Its solid phase, atomic mass of 101.07 u, and electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s¹ 4d⁷ make it useful for comparing bonding patterns across the periodic table.
Discovery and Occurrence
Ruthenium was discovered 1844 by Karl Ernst Claus. Ruthenium is a chemical element with symbol Ru and atomic number 44. It is a rare transition metal belonging to the platinum group of the periodic table.
Safety and Handling Context
Ruthenium is presented here for learning and comparison. Pure elements and laboratory compounds can have hazards that depend on dose, form, and setting.
Related Elements
Frequently Asked Questions
- What is the atomic number of Ruthenium?
- Ruthenium has atomic number 44, which means a neutral atom has 44 protons and 44 electrons.
- What is the chemical symbol for Ruthenium?
- The chemical symbol for Ruthenium is Ru.
- What category is Ruthenium in?
- Ruthenium is classified as a transition metal and sits in period 5 of the periodic table.
Explore Ruthenium in 3D
Use the interactive table above to rotate atomic models, compare periodic trends, and move from Ruthenium to neighboring elements without losing your place.