In general, the boiling points of compounds increase down a group in the periodic table. The melting points and boiling points for the hydrogen compounds of group 6A elements are in the table below.
|
Melting Point (°C)
|
Boiling Point (°C)
|
|
H2O
|
0.0
|
100.0
|
|
H2S
|
-82.0
|
-60.0
|
|
H2Se
|
-65.7
|
-41.2
|
|
H2Te
|
-49.0
|
-2.2
|
Use your understanding of chemistry to propose an explanation for the anomaly in the trend for the hydrogen compounds of group 6A elements shown in the table below?