If they are in the same group they have the same valence electrons but since I cannot see what you’re talking about I’m not sure what your question is
Do you need help with all 3 questions or just the one that’s unanswered?
solution:
the change in the boiling point is given as,
dTbp =2.30°c
elevation constant for the solvent is given by,
kb=0.512°c/m

= 4.49m
Answer:
the answer is your a awesome person