Tačno
Netačno
positive
negative
neutral
copper, tin
tin, lead
copper, zinc
gold, silver, copper (gold and any other one)
A
B
C
D
E
F
G
H
H2 + Cl2 → 2HCl
H2 + 2Cl2 → HCl
2H2 + Cl2 → HCl
2H2 + 2Cl2 → HCl
Na + Cl2 → 2NaCl
2Na + Cl2 → NaCl
2Na + Cl2 → 2NaCl
2Na + 2Cl2 → NaCl
NH3 → 3N2 + 3H2
2NH3 → 2N2 + H2
3NH3 → N2 + 2H2
2NH3 → N2 + 3H2
Copper
Chlorine
Silicon
Calcium
Number of neutrons: 18; number of
electrons: 17
Number of neutrons: 20; number of
electrons: 18
Number of neutrons: 20 number of
Iron
Gold
X is more viscous than Y.
X has a higher boiling point that Y.
X is more volatile than Y.
The colour of X is darker than Y.
B. Perspex
Sulphur
Silver
Reduce
Reuse
Recycle
Replace