In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

[Q]: Question: How many protons and electrons each do carbon atoms have? Answer: six
[A]: Carbon atoms have six protons and electrons each.


[Q]: Question: Where are protons and neutrons located? Answer: central nucleus
[A]: Protons and neutrons are located in the central nucleus.


[Q]: Question: Many glasses eventually crystallize, rendering them brittle and this? Answer: opaque
[A]:
Many glasses eventually crystallize, rendering them brittle and this?