The ionic formula of sodium oxide would be Na20
I cannot see your question to help you... sorry
#1- Identify a problem
#2- Collect info on your problem
#3- Make a hypothesis
#4- Design an experiment to test your hypothesis
#5- Collect data and observations
#6- Accept or reject your hypothesis
#7- Record results
Hope this helps.
Separation will be achieved if one component adheres to the stationary phase more than the other component does.