proton

noun 0.785

nucleon number

noun 0.733

atomic number

noun 0.707

electron number

noun 0.650

nucleon

noun 0.611

protonation

noun 0.607

proton pump

noun 0.594

nuclear charge

noun 0.584

baryon number

noun 0.582

antiproton

noun 0.578

atomic nucleus

noun 0.570

protium

noun 0.569

mass number

noun 0.567

quantum number

noun 0.557

hydrogen ion

noun 0.555

neutron

noun 0.551

positron

noun 0.548

oxidation number

noun 0.547

alpha particle

noun 0.544

pronucleus

noun 0.543

nuclide

noun 0.539

effective nuclear charge

noun 0.534

counting number

noun 0.521

phone number

noun 0.520

nuclear physics

noun 0.515

hydronium

noun 0.514

hydrogen

noun 0.513

positronium

noun 0.511

subatomic particle

noun 0.509

telephone number

noun 0.506

elementary particle

noun 0.505

charged particle

noun 0.505

ploidy

noun 0.501

hadron

noun 0.501

house number

noun 0.501