Atomic Number
75
Element 75
Rhenium (Re)
Rhenium is a chemical element with symbol Re and atomic number 75. It is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table.
Atomic Mass
186.21 u
Category
Transition Metal
Period
6
Group
Group 7: manganese group
Phase
solid
Density
21.02 g/cm3
Electron Shells
2, 8, 18, 32, 13, 2
Atomic Structure
Protons: 75. Electrons: 75. Neutrons: Varies by isotope.
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d⁵
Why Rhenium Matters
Rhenium helps connect atomic number 75, transition metal behavior, period 6 trends, and electron shell structure. Its solid phase, atomic mass of 186.21 u, and electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d⁵ make it useful for comparing bonding patterns across the periodic table.
Discovery and Occurrence
Rhenium was discovered 1925 by Ida Noddack, Walter Noddack, Otto Berg. Rhenium is a chemical element with symbol Re and atomic number 75. It is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table.
Safety and Handling Context
Rhenium 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 Rhenium?
- Rhenium has atomic number 75, which means a neutral atom has 75 protons and 75 electrons.
- What is the chemical symbol for Rhenium?
- The chemical symbol for Rhenium is Re.
- What category is Rhenium in?
- Rhenium is classified as a transition metal and sits in period 6 of the periodic table.
Explore Rhenium in 3D
Use the interactive table above to rotate atomic models, compare periodic trends, and move from Rhenium to neighboring elements without losing your place.