Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Input: Consider Input: Monatomic ions form when a single atom gains or loses electrons.

Output: What form when a single atom gains or loses electrons?


Input: Consider Input: The properties of the alkali metals are similar to each other as expected for elements in the same family.

Output: The properties of the alkali metals are similar to each other as expected for elements in the same what?


Input: Consider Input: The size and symmetry of a beetle’s or an elk’s antlers or a grasshopper’s song communicate rather clearly their state of health.


Output: The size and symmetry of a beetle’s or an elk’s antlers or a grasshopper’s song communicate rather clearly their state of what?