rubidium is the fourth element in group 1. predict the following properties of rubidium and its compunds:

A. appearence
B. hardness
C. reaction with water
D. appearance and solubility of rubidium chloride
E. electrical conductivity

3 answers

Look at the properties of the other elements that you know in group 1. Rb should be similar. For example, D. I now NaCl is a white crystalline solid that is soluble in water. I would expect RbCl to be the same.
if i am wrong correct me- it is very hard to cut
its reaction with water is vigorous
its appearance-stored in oil white solid lump
The reaction with water is vigorous.
The appearance stored in oil should be a silvery solid
but the first one is not correct. Sodium is a soft silvery metal. I would expect Rb to be a soft silvery metal also. It is easily cut into small pieces with a pocket knife.