93-neptunium
Isotopes:
Np-225 Np-226 Np-227 Np-228 Np-229 Np-230 Np-231 Np-232 Np-233 Np-234 Np-235 Np-236 Np-237 Np-238 Np-239 Np-240 Np-241 Np-242 Np-243 Np-244

For information on elements, we recommend

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