Odpowiedź:
ZAD.1
potas [K]- 39u
bar [Ba]- 137u
chrom [Cr]- 52u
miedź [Cu]- 64u
brom [Br]- 80u
ZAD.2
P₄= 31u·4= 124u
NaCl= 23u+35u= 58u
N₂= 14u·2= 28u
K₂S= 39u·2+32= 110u
NH₃= 14u+1u·3= 17u
Mg(OH)₂= 24u+16u·2+1u·2= 58u
Ca₃(PO₄)₂= 40u·3+(31u+16u·4)² = 120u+190u= 310u
Fe(NO₃)₃= 56u+(14u+16u·3)₃= 56u+186u= 242u
ZAD.3
Stront [Sr]- lp+ 38 e- 38 n0 30
Cynk [Zn]- lp+ 30 e- 30 n0 35
Krzem [Ci]- p+ 14 e- 14 n0
Jod [I]- p+ 53 e- 53 n0 74
Lit [Li]- p+ 3 e- 3 n0 4
Chlor [Cl]- p+ 17 e-17 n0 18
ZAD.4
Mg₂₆= p+ 12 n0 14
Sn₁₁₆= p+ 50 n0 66
C₁₃= p+6 n0 7
