Pls help if you only know the correct answer! Thanks! :)

Which element in the third period would you expect to have the larger atomic radius, sodium (na) or sulfur (s)? a. sodium, because it has a higher effective nuclear charge attracting electrons in fewer energy levels. b. sodium, because it has fewer protons attracting electrons in the same energy levels. c. sulfur, because it has more protons attracting electrons in more energy levels. d. sulfur, because it has a higher effective nuclear charge attracting electrons in the same energy levels.

What element has similar physical and chemical properties as boron.

Show how to convert the temperature 84.7° c to kelvin. include all steps and label the final answer