Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

[EX Q]: Question: What determines how strongly an atom attracts electrons to itself? Answer: electronegativity
[EX A]: The electronegativity of an atom determines how strongly it attracts electrons to itself.

[EX Q]: Question: When two haploid gametes unite during fertilization they form what? Answer: a diploid cell
[EX A]: diploid cell that forms when two haploid gametes unite during fertilization.

[EX Q]: Question: Amines are bases; they react with acids to form what? Answer: salts
[EX A]:
Amines are bases; they react with acids to form salts.