Difference between Atomic Number 89 and Actinium

ATOMIC NUMBER 89 vs ACTINIUM: NOUN

A radioactive, metallic chemical element (symbol: Ac) with an atomic number of 89; found in uranium ores
A supposed metal, said by Phipson to be contained in commercial zinc; -- so called because certain of its compounds are darkened by exposure to light.
A radioactive substance found by Debierne to exist in the residues remaining from pitchblende after the extraction of the uranium: a new radio-element closely related in its chemical behavior to lanthanum, from which it has not as yet been found possible to separate it completely.
A supposed chemical element found associated with zinc. Its chemical and physical properties have not been fully investigated.
A radioactive element found in uranium ores, used in equilibrium with its decay products as a source of alpha rays. Its longest lived isotope is Ac-227 with a half-life of 21.77 years. Atomic number 89; melting point 1,050°C; boiling point 3,198°C; specific gravity (calculated) 10.07; valence 3. : Periodic Table.
A radioactive element of the actinide series; found in uranium ores

Argon, Nitrogen, Magnesium, Iodine, Curium, Radon, Erbium, Transuranic, Eighty, Rubidium, Actinon, Actinoid, Actinide, Yttrium, Actinium

Radiostrontium, Meitnerium, Metallic element, Chemical element, Bohrium, Mendelevium, Atomic number, Actinoid, Transactinide, Ionium, Mesothorium, Actinon, Emanation, Atomic number 89, Ac

Boron, Argon, Nitrogen, Magnesium, Iodine, Radon, Erbium, Transuranic, Eighty, Rubidium, Actinon, Actinoid, Actinide, Yttrium, Actinium

Ununtrium, Ununoctium, Radiostrontium, Meitnerium, Metallic element, Chemical element, Bohrium, Mendelevium, Atomic number, Actinoid, Transactinide, Ionium, Mesothorium, Actinon, Emanation

Xofigo, a Bayer AG drug that treats prostate cancer, has an active ingredient derived from an actinium isotope.
Production of efficient, pure conjugates would benefit from a better understanding of the basic actinium chemistry.
Both the uranium and the actinium decay series have three features in common.
ACTEX INTERNATIONAL CORPORATION ACTIA CORPORATION ACTIFACT CORP ACTINIUM PHARMACEUTICAL, INC.
All actinides are radioactive, paramagnetic, and, with the exception of actinium, have several crystalline phases.
We also face competition in our conditioning programs from Actinium Pharmaceuticals, Inc.
How can I find the electron and proton numbers of actinium?
Actinium is a radioactive substance that glows blue.
Spectroscopic and computational studies of actinium coordination chemistry.
The close similarity of physical and chemical properties of actinium and lanthanum makes separation of actinium from the ore impractical.