I believe that you are needing to pick from the three word choices. I believe the first one would be fact and the second one would be conduct experiment.
C the answer is cesium, study's show that it has the lowest ionization out of all elements. Hope this helped!
Answer:
i think the long wavelength has more energy
Explanation:
plz correct me if i'm wrong
Answer : The volume of 3.0 M spinach solution added should be, 50 mL
Explanation :
Formula used :

where,
are the initial molarity and volume of spinach solution.
are the final molarity and volume of diluted spinach solution.
We are given:

Now put all the given values in above equation, we get:

Hence, the volume of 3.0 M spinach solution added should be, 50 mL
It will be:
b. Alkyne* series
* You have done a spelling mistake here. It will be "Alkene" not "Alkyne".