Hydrogen and lithium react very differently,although they are both members of Group 1.What is the primary reason for this difference?
A)The metallic character increases going down a group.
B)The ionization energy increases going down a group.
C)Electron affinity increases going down a group.
D)Electronegativity increases going down a group.
E)There is a very large difference in the atomic radii of H and Li.

Question

Quizplus · Accepted Answer

The primary reason for the difference in reactivity between hydrogen and lithium is the large difference in their atomic radii. Hydrogen has a much smaller atomic radius than lithium, which affects the way it interacts during chemical reactions. Specifically, hydrogen's small size allows it to more easily form covalent bonds, while lithium's larger size makes it more likely to form ionic bonds. This leads to different types of reactions and reactivity between the two elements, despite their shared membership in Group 1.

Hydrogen and Lithium React Very Differently,although They Are Both Members