What element in the same group as hydrogen has a larger atomic radius?

Question

What element in the same group as hydrogen has a larger atomic radius?

1. helium
2.  Mercury
3.  rubidium
4.  tungsten
5.  none of the above

Answer 1

ANSWER: NONE OF THE ABOVE

The group that hydrogen belongs to is Group 1, also known as the alkali metals.

In general, as we move down a group, the atomic radius increases. Therefore, the element in the same group as hydrogen that has a larger atomic radius is the one located below it, which is rubidium (Option C). Helium (Option A) is in Group 18 and has a smaller atomic radius than hydrogen, while mercury (Option B) and tungsten (Option D) are transition metals and are not in Group 1.