This is kind of hard to show without the picture, but to make an ionic bond with Na and Fl you would have the sodium move an electron to the fluorine, so the answer is C! This is because of the fact that sodium has an outer shell valance electron (so it's unstable) and the fluorine would accept that because it is missing an electron in the outer shell. So this sharing would lead to the bond being created!
C. When the air cannot support any more water vapor
50% probability that a human sperm cell will carry an X chromosome
Answer
you attend to any illness or disease by going to the doctor at the first sign of it
you make sure that your health choices reduce the risk of potentially negative situations.
Explanation:
C. Protective over young cubs
