Democritus's idea of matter doesn't relate atoms to a measurable property, while Dalton's theory can be tested through quantitative experimentation. Hope it helped :)
2KOH + Cu(NO3)2 → 2KNO3 + Cu(OH)2
2K⁺ 1Cu²⁺ 2K⁺ 1Cu²⁺
2OH ⁻ 2NO3⁻ 2NO3⁻ 2OH⁻
