Question

помогите 1-5 пожалуйста

Answer 1

1) 55 - Cs, 85 - At, 81 - Tl, 56 - Ba
Cs, Ba, Tl, At
2) 50 - Sn, 37 - Rb, 52 - Te, 38 - Sr
Te, Sn, Sr, Rb
3) 81 - Tl (Tl2O3), 56 - Ba (BaO), 83 - Bi (Bi2O5)
BaO, Tl2O3, Bi2O5
4) 15 - P (P2O5), 83 - Bi (Bi2O5), 7 - N (N2O5)
N2O5, P2O5, Bi2O5
5) 4 - Be (Be(OH)2), 56 - Ba (Ba(OH)2), 12 - Mg (Mg(OH)2), 20 - Ca (Ca(OH)2)
Ba(OH)2, Ca(OH)2, Mg(OH)2, Be(OH)2