Im stuck on these two questions anyone have the right answer?

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.

How to convert a density of 0.791g/cm3 to lb/ft3

Which of the following best supports the concept that genetic information is passed on to offspring from both of their parents, not just one?