(chemistry) a series of 15 radioactive elements with increasing atomic numbers from actinium to lawrencium

(chemistry) a series of 15 radioactive elements with increasing atomic numbers from actinium to lawrencium

(chemistry) a series of 15 radioactive elements with increasing atomic numbers from actinium to lawrencium

(chemistry) a series of 15 radioactive elements with increasing atomic numbers from actinium to lawrencium

(chemistry) a series of 15 radioactive elements with increasing atomic numbers from actinium to lawrencium

a radioactive element of the actinide series; found in uranium ores

a radioactive element of the actinide series; found in uranium ores

(chemistry) a series of 15 radioactive elements with increasing atomic numbers from actinium to lawrencium

(chemistry) a series of 15 radioactive elements with increasing atomic numbers from actinium to lawrencium

(chemistry) a series of 15 radioactive elements with increasing atomic numbers from actinium to lawrencium