Atomic Number
83
Element 83
Bismuth (Bi)
Bismuth is a chemical element with symbol Bi and atomic number 83. A pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony.
Atomic Mass
208.98 u
Category
Post-Transition Metal
Period
6
Group
Group 15: nitrogen group
Phase
solid
Density
9.78 g/cm3
Electron Shells
2, 8, 18, 32, 18, 5
Atomic Structure
Protons: 83. Electrons: 83. Neutrons: Varies by isotope.
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p³
Why Bismuth Matters
Bismuth helps connect atomic number 83, post-transition metal behavior, period 6 trends, and electron shell structure. Its solid phase, atomic mass of 208.98 u, and electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p³ make it useful for comparing bonding patterns across the periodic table.
Discovery and Occurrence
Bismuth was discovered 1753 by Claude François Geoffroy. Bismuth is a chemical element with symbol Bi and atomic number 83. A pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony.
Safety and Handling Context
Bismuth 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 Bismuth?
- Bismuth has atomic number 83, which means a neutral atom has 83 protons and 83 electrons.
- What is the chemical symbol for Bismuth?
- The chemical symbol for Bismuth is Bi.
- What category is Bismuth in?
- Bismuth is classified as a post-transition metal and sits in period 6 of the periodic table.
Explore Bismuth in 3D
Use the interactive table above to rotate atomic models, compare periodic trends, and move from Bismuth to neighboring elements without losing your place.