Name |
Actinium |
Symbol |
Ac |
Atomic Number |
89 |
Atomic Mass |
227 amu |
Number of Protons |
89 |
Number of Electrons |
89 |
Number of Neutrons |
138 |
Melting Point |
1050 degrees Celcius |
Boiling Point |
3200 degrees Celcius |
Normal Phase |
Solid |
Family |
Rare Earth Metal |
Period |
7 |
Group |
Actinide |
Origin of Name |
From the Greek word, aktinos, meaning ray |
Date & Place of Discovery |
Discovered by Andre-Louis Debierne and F. Giesel in 1899 France |
Intersting Facts |
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Common Uses |
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