Question

14. Which of the following elements have properties similar to those of astatine (At)?

F, Br, I
Ar, S, P
F, Ar, Ne
Na, Mg, Al

Answer 1

For problems like these, it's generally a good idea to look down the same group (row) as the initial element, which is Astatine. See how Iodine, Bromine, and Fluorine are on the same group? This is because they all have a common amount of electrons in the outer orbital. Therefore, they are likely to form similar reactions.

Hopefully this helped! :)