Fermium

Fermium (Fm) is chemical element 100, in the period 7 actinoid series.

Atomic number
100
Symbol
Fm
Also known as
Fm, 镄, 鐨, 镄元素, 鐨元素

Overview

Fermium (Fm) is chemical element 100, in the period 7 actinoid series.

Atoms of fermium have 100 protons in the nucleus. Its position in the period 7 actinoid series provides the periodic context for comparing it with neighbouring elements.

Identifiers

Atomic number
100
Symbol
Fm
Also known as
Fm, 镄, 鐨, 镄元素, 鐨元素

Properties

Period
7
Category (PubChem)
Actinide

References

  1. PubChem Periodic Table: element dataNational Center for Biotechnology Information · PubChem

    Retrieved 2026-09-16. Supplies all 118 atomic numbers, symbols, English names and reference categories. Atomic masses and state predictions are not imported as molecular properties.

  2. Periodic Table of ElementsInternational Union of Pure and Applied Chemistry · IUPAC

    Reference for accepted element names, symbols and periodic placement. Group numbers are omitted for the separately displayed lanthanoid and actinoid series.

  3. IUPAC化学元素周期表（中文版）中国化学会 · Chinese Chemical Society · 2019

    Simplified-Chinese element names and periodic-table positions checked against the January 2019 source.

  4. 化學名詞—化學元素一覽表國家教育研究院化學名詞審譯委員會 · National Academy for Educational Research · 2017

    Official 2017 revised list redistributed by 臺南市立將軍國民中學. The attached 20170818化學元素表.doc was downloaded and all 118 number/symbol/name rows checked. Component glyph descriptions are represented by their Unicode characters; documented regional names are retained as search aliases.

  5. Accessing the Chemical Elements Data from PubChemSunghwan Kim · IUPAC FAIR Chemistry Cookbook · 2024

    Documents the PubChem element-data service, its 118-row coverage and derivation of periods from atomic numbers.