---
title: "BIP39 Word #304: chalk — Seed Phrase Mnemonic Word"
url: "https://bip39-phrase.com/bip39-word/chalk/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

Word #304 00100101111 

# chalk — BIP39 word #304

"**chalk**" is word #304 of the 2048 words in the official BIP39 English wordlist, between [chair](/bip39-word/chair/) and [champion](/bip39-word/champion/). In a seed phrase it stands for the 11-bit value `00100101111`, decimal index 303\. 

/ʧɔːk/  · _noun:_ a soft white rock, or a stick of it used for writing 

[Russian](/ru/ "The BIP39 wordlist with Russian translations"): мел 

## Binary Representation

Six 1-bits and five 0-bits; 462 of the 2048 indexes have exactly six 1-bits.

One wrong bit turns it into (leftmost bit first):

[planet](/bip39-word/planet/)[grass](/bip39-word/grass/)[album](/bip39-word/album/)[curious](/bip39-word/curious/)[combine](/bip39-word/combine/)[capable](/bip39-word/capable/)[child](/bip39-word/child/)[ceiling](/bip39-word/ceiling/)[century](/bip39-word/century/)[certain](/bip39-word/certain/)[chair](/bip39-word/chair/) 

Position

Hex Index

0x12F

4-Letter Prefix

chal

## About "chalk" in BIP39

- "chalk" has 5 letters, but the first four, **"chal"**, already identify it, because **"cha"** also begins 8 other words, among them [chair](/bip39-word/chair/), [champion](/bip39-word/champion/), [change](/bip39-word/change/) and [chaos](/bip39-word/chaos/).
- **"chal"** is unique only within the English list: it also begins chaleur in the [French list](/french/), chaleco in the [Spanish list](/spanish/), chaleira in the [Portuguese list](/portuguese/) and chalupa in the [Czech list](/czech/), so a four-letter backup should say which list it uses.

## Word #304 in the Other 9 BIP39 Wordlists

[Czech](/czech/) dusno 

[French](/french/) buvable 

[Italian](/italian/) capogiro 

[Japanese](/japanese/) おやつ 

[Korean](/korean/) 남학생 

[Portuguese](/portuguese/) blindado 

[Spanish](/spanish/) cabra 

[Traditional Chinese](/chinese-traditional/) 清 

[Simplified Chinese](/chinese-simplified/) 清 

## Similar Words — Check Carefully During Recovery

Read aloud, "chalk" /ʧɔːk/ is one sound away from these 5 words: 

[check /ʧɛk/](/bip39-word/check/)[fork /fɔːk/](/bip39-word/fork/)[hawk /hɔːk/](/bip39-word/hawk/)[talk /tɔːk/](/bip39-word/talk/)[walk /wɔːk/](/bip39-word/walk/) 

Words sharing the first three letters "cha":

[chair](/bip39-word/chair/)[champion](/bip39-word/champion/)[change](/bip39-word/change/)[chaos](/bip39-word/chaos/)[chapter](/bip39-word/chapter/)[charge](/bip39-word/charge/)[chase](/bip39-word/chase/)[chat](/bip39-word/chat/) 

## More BIP39 Words Starting with "C"

[ #300 century ](/bip39-word/century/)[ #301 cereal ](/bip39-word/cereal/)[ #302 certain ](/bip39-word/certain/)[ #303 chair ](/bip39-word/chair/)[ #305 champion ](/bip39-word/champion/)[ #306 change ](/bip39-word/change/)[ #307 chaos ](/bip39-word/chaos/)[ #308 chapter ](/bip39-word/chapter/) 

[View all words starting with "C" ](/bip39-words/c/) 

## Seed phrase, key and recovery guides

- [Is a Seed Phrase Case Sensitive? BIP39 Words vs Passphrase](/is-seed-phrase-case-sensitivity-really-important/)
- [BIP-444 (Now BIP 110): Reduced Data Temporary Softfork Explained](/bip-444-reduced-data-temporary-softfork/)
- [Metal Seed Phrase Backup: Steel Plates, Tiles and Tests](/metal-seed-phrase-backup/)

[ Full BIP39 Wordlist ](/)