Chemical Symbols 61-90
English
심화
Signs and symbols of the 61st to 90th chemical elements of the periodic table. "Chemical symbol," Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/w/index.php?title=Chemical_symbol&oldid=953572147 (accessed May 14, 2020).
설명
30
질문
10 초
질문당
0:45
평균 시간
3.0
대회 점수
5
참가자
Question 10: there are two times the answer Yb.