chemistry

上面個位,,你所指的 b.p. is wrong
- 196°C should be the b.p of nitrogen!!
Three physical properties:
(1) Hydogen is a colourless , smelless gas.
(2) Hydrogen has a low melting point ( - 259.14 °C) ,, and low boiling point (- 252.87 °C)
(3) Hydogen is a non- metal.
One chemical property:
Hydrogen is very reactive,
2 hydrogen atoms react with 1 oxgen atom to form Water ((H2O))

a) colourless
state : gas
boiling is -196度
b) it react with oxygen to become water