Chemistry!! (15 points!)

1. iodine is solid at room temperature, not liquid.
Iodine 's atom is large so the van der Waals' force between molecules is big.
That 's why iodine is solid at room temperature.

2. 4827 C

3. they are undiscovered, both in g-block, and radioactive.

4. Which TPC? TPC has a lot of meaning.

2010-01-12 13:21:52 補充：
solution means iodine is dissolve in a kind of liquid solvent! Of course it is a liquid!

2010-01-12 13:42:08 補充：
Iodine solution means iodine dissolve in some kind of liquid solvent. Of course it is a liquid.

2010-01-12 13:47:49 補充：
iodine solution means iodine dissolve in some kind of liquid solvent
Of course it is a liquid

2010-01-12 13:47:59 補充：
iodine solution means iodine dissolve in some kind of liquid solvent
Of course it is a liquid

2010-01-12 13:49:47 補充：
對不起，找不到TPC的用途
只知它是一種化學試劑

the answer in chemistry book

1. room pressure may be too low
3. metal