-

➤ Leads to radiation sickness - radiation dermatitis, pneumonitis and respiratory oncology.

-

-

-

-

➤ Toxic effects in the form of damage to cellular structures and destruction of the chemical structure of nucleic acids.

➤ Generalized weakness, pharyngeal reflex, and deviant behavior are characteristic.

➤ Antidote: Symptomatic therapy.

➤ In test tubes with a volume of one hundred thousandth of a millimetre, Macmillan obtained a solution of neptunium with a concentration of 0.1 g/l.

➤ Different Np ions colour solutions differently:

➤ Np⁺³ - blue or magenta,

➤ Np⁺⁴ is yellow and green.

➤ In nature, Np is formed from uranium nuclei under the influence of cosmic rays and neutrons.