1.
Rubidium metal (Rb):
Rubidium metal (Rb)
2.
Water (H2O)
:
Water (H2O)
3.
The plastic container that reaction is taking place in.:
The plastic container that reaction is taking place in.
4.
The brick wall:
The brick wall
5.
The string and the hammer:
The string and the hammer
6.
Rubidium Hydroxide (RbOH):
Rubidium Hydroxide (RbOH)
7.
Hydrogen gas (H2)
:
Hydrogen gas (H2)
Column B
a.Surroundings
b.System
a. Surroundings
b. System