Question

What do the elements lithium, sodium, and potassium have in common?

Answer 1

That they are all mighty reactive.

Explanation:

`Li`, `Na`, and `K` are all `"Group I"`, i.e. alkali metals.

While they are all water sensitive, sodium, and more so potassium are especially reactive. Sodium and potassium are very malleable and ductile at room temperature.