TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: The properties of the alkali metals are similar to each other as expected for elements in the same family.

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

PROBLEM: How much is involved in the reaction does the coefficient in front of an element in a formula indicate.

SOLUTION: What does the coefficient in front of an element in a formula indicate?

PROBLEM: Metallic solids are composed entirely of metallic atoms.

SOLUTION:
Metallic solids are composed entirely of which atoms?