yuánzì Chinese characters of the chemical elements
砹

Astatine At · 85

ài

solid non-metal · period 6, group 17 · p-block

Anatomy

石 radical 石 shí
stone → solid non-metal
+ 艾 phonetic
from astatine =
砹 ài

Transliteration. The phonetic half approximates the international name. Astatine

History of the character

Every form found in the sources, from the first missionary chemistry books of the 1850s to the current standards. Hover a dot for the source. Simplified 砹, traditional 砹, Taiwan 砈 ài.

1850187519001925195019752000antiquitytoday
鈪 è
1948 · 曾提議 · Proposed, not adopted — Various erroneous early form; 銰 also occurs
砹 ài
1991 · 化學名詞 · Chemical Terms (1991) — China National Committee for Terms in Sciences and Technologies (全國科學技術名詞審定委員會)
砈 ài
today · 臺灣正體（國家教育研究院） · Current Taiwan standard — National Academy for Educational Research, Taiwan
  1. 1948 鈪 è 曾提議 Proposed, not adopted, Various erroneous early form; 銰 also occurs
  2. 1991 砹 ài 化學名詞 Chemical Terms, China National Committee for Terms in Sciences and Technologies (全國科學技術名詞審定委員會)
  3. today 砈 ài 臺灣正體（國家教育研究院） Current Taiwan standard, National Academy for Educational Research, Taiwan

Homophones

Same syllable, different tone: 锿 āi Einsteinium.

Elsewhere

Japanese アスタチン Korean 아스타틴 Vietnamese astatin

Western name from Greek ἄστατος (astatos), “unstable”. Compare all

Unicode

U+7839 in CJK Unified Ideographs