8. Proton neutrons have no quarks. 9. The nuclear toll number is 10. The nuclear charge number is 1 1. The proton neutron isotope is 12. The negative ion is 13. Iron atom, water molecule, sodium ion and chloride ion are 14. Pure substances of the same element have pure substances of different elements.
BDBBD ABAAA ADACD CBBCC
.21metallic solid nonmetallic gas 22 C > b > A 23 hydrogen chemical molecules are decomposed into atoms, and the atomic composition molecules are 24134 562 26 567124 3.