Chemical Symbols 61-90
English
Murakkab
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).
Tavsif
Teglar
30
Savollar
10 soniya
Har bir savolga
0:45
Oʻrtacha vaqt
3,0
Tanlov balli
5
Ishtirokchilar
Question 10: there are two times the answer Yb.