Subatomic Particle With No Electric Charge
This page is the CodyCross answer for the clue below from Train Travel, Group 719, Puzzle 3 (Trans Siberian Railway).
Question is: Subatomic Particle With No Electric Charge
and the answer is: NEUTRON
Word Meaning:
NEUTRON — (particle physics) A subatomic particle forming part of the nucleus of an atom and having no charge; it is a combination of an up quark and two down quarks.
Definitions from Wiktionary.