The atom symbol (⚛) is Unicode U+269B in the Miscellaneous Symbols block. It is a compact science / chemistry icon used in branding, lab labels, and educational UIs. HTML has no standard named entity — use numeric or CSS forms (or type the character in UTF-8).
Remember
Character ⚛
Unicode U+269B
Hex entity ⚛
Decimal ⚛
Named entity (none)
CSS escape \269B
Tip Pair with the word “atom”
All of these produce the same glyph: ⚛. Prefer typing ⚛ in UTF-8 when you can; use ⚛ / ⚛ or CSS for generated content.
One page that shows ⚛ with hex, decimal, CSS escape, and a typed character. Use View Output or open the live editor.
Hex + Decimal + CSS + Typed
Four ways to produce ⚛ in a single document (no named entity).
html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Atom Symbol (⚛) in HTML</title>
<style>
#point::after {
content: "\269B";
}
</style>
</head>
<body>
<p>Atom symbol using Hex Code: ⚛</p>
<p>Atom symbol using HTML Code: ⚛</p>
<p id="point">Atom symbol using CSS Entity: </p>
<p>Typed directly: ⚛</p>
</body>
</html>
Atom symbol using Hex Code: ⚛
Atom symbol using HTML Code: ⚛
Atom symbol using CSS Entity: ⚛
Typed directly: ⚛
How It Works
1. Hex:U+269B → ⚛ in HTML. The browser turns it into ⚛.
2. Decimal: same code point as 9883 → ⚛. Same result as hex.
3. CSS: use \269B in content (not an HTML entity). #point::after appends that ⚛ after the paragraph text.
4. Typed ⚛: fine in UTF-8 source. All four lines show the same glyph.
Pitfalls & Tips
Common mistakes when working with the atom symbol (⚛).
Named
No &name; form
U+269B has no standard named entity — use ⚛ or ⚛.
a11y
Add plain-language labels
Screen readers may not speak “atom.” Pair the glyph with visible text or an accessible name.
Fonts
Check symbol coverage
Some UI fonts omit a polished U+269B. Prefer fonts with solid Miscellaneous Symbols coverage.
CSS vs HTML
Do not mix escapes
\269B belongs in CSS. ⚛ / ⚛ belong in HTML.
Emoji
Style may vary
Some platforms render ⚛ with emoji-like colors. Test your font stack if you need a plain text glyph.
Semicolon
End references
Always finish with ; — write ⚛, not ⚛.
Compatibility
Browser Support
The atom symbol (U+269B) and its entity forms (⚛, ⚛, CSS \\269B) are supported in all mainstream browsers. Glyph quality depends on font support for Miscellaneous Symbols.
✓ Universal support
Atom Symbol (⚛)
Type ⚛, or encode with hex, decimal, or CSS escape — same glyph everywhere encoding is supported.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerAll versions
Yes
U+269B / entitiesFull support
Bottom line: Prefer a typed ⚛ or ⚛ for science icons. Use decimal when generating markup, and \\269B only inside CSS content.
Remember
Key Takeaways
Unicode: atom symbol is U+269B (decimal 9883).
HTML: use ⚛ or ⚛ (no named entity).
CSS: use \269B inside content for generated icons.
Watch out: always pair ⚛ with a clear label for accessibility.
One line:U+269B → ⚛ / ⚛ / CSS \269B.
Frequently Asked Questions
Use ⚛ (hex), ⚛ (decimal), or the CSS escape \269B in the content property. All render ⚛. You can also paste ⚛ directly if your file is UTF-8. There is no standard named entity.
U+269B (hex 269B, decimal 9883). Unicode names it ATOM SYMBOL. It belongs to the Miscellaneous Symbols block.
No. HTML5 / WHATWG does not define a named character reference for U+269B. Prefer ⚛, ⚛, or a typed ⚛ in UTF-8.
HTML entities (⚛ or ⚛) go in markup. The CSS escape \269B is used in stylesheets (usually in the content property of ::before/::after). Both render ⚛.
For science branding, chemistry education, lab labels, and periodic-table style UIs. Prefer a math/symbol-capable font so the orbits read clearly at small sizes.
Not always — screen readers may not announce “atom.” Pair the glyph with visible text or an accessible name when the meaning matters.
🤔
Did you know?
The atom symbol is Unicode U+269B (decimal 9883) in the Miscellaneous Symbols block — official name ATOM SYMBOL. There is no standard named HTML entity. Pair the glyph with the word “atom” or an accessible label when meaning must be clear to every reader.
