---
id: "chemical_element_symbol"
kind: "datatype"
status: "draft"
is_pii: false
categories: ["chemistry", "science"]
langs: ["common"]
quality: 80
url: "https://registry.apicrafter.io/datatype/chemical_element_symbol"
---

# Chemical element symbol (`chemical_element_symbol`)

> **Draft.** Draft records have not been reviewed yet and may be incomplete or wrong; do not treat them as authoritative for legal or compliance decisions.

Symbol of a chemical element in the periodic table, one capital letter or a capital and a lowercase letter, as in H or Fe. There are 118 named elements. Many other two-letter strings match the pattern, so use the field name or context.

- Personal data (PII): no
- Categories: Chemistry (chemistry), Scientific (science)
- Countries: global
- Languages: Common to most languages (common)
- Classification: categorical

## Detection

Regular expression (Python `re`):

```
^[A-Z][a-z]?$
```

## Examples

- `H` — Hydrogen
- `Fe` — Iron
- `Og` — Oganesson, element 118
- `FE` (invalid example) — Second letter in upper case

## Translations

- ru: Символ химического элемента

## Sources

- wikipedia: <https://en.wikipedia.org/wiki/Chemical_symbol>

## Quality

Score 80/100. Missing: mapping (Wikidata, Schema.org, ...), detector coverage.

JSON: <https://registry.apicrafter.io/api/v1/datatypes/chemical_element_symbol.json> · Edit: <https://github.com/apicrafter/metacrafter-registry/edit/main/data/datatypes/any/chemistry/chemical_element_symbol.yaml>