The original child of everything is the atom. It is the child from which everything else is created, for it was the original child. Atoms are the building blocks of all things!
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
In the future, I think I want to study atomic energy.
What was the atomic number and atomic symbol of this atom?
Aging nuclear power plants are a problem for many countries.