Actinides

The Actinides are a highly radioactive group of metals located on the second row below the periodic table. They all react readily with oxygen, and behave as heavier counterparts of the Lanthanides. They all have very short half-lives. There is generally a lot of controversy around owning these elements because of their history and possible malicious uses,  (Thorium, Uranium, Neptunium, Plutonium, Americium) or because of their radioactivity and toxicity.  They all fill the empty f orbital as you go down the series. The second half of the actinide series are mostly synthetic elements because of their short half-life.

There are 15 members of the actinide series

Actinium- electron configuration: [Rn] 6d1 7s2

Thorium- electron configuration: [Rn] 6d2 7s2

Protactinium- electron configuration: [Rn]  5f2 6d1 7s2

Uranium- electron configuration:[Rn] 5f3 6d1 7s2

Neptunium- electron configuration: [Rn] 5f4 6d1 7s2

Plutonium- electron configuration:[Rn] 5f6 7s2

Americium- electron configuration:[Rn] 5f7 7s2

Curium- electron configuration:[Rn] 5f7 6d1 7s2

Berkelium- electron configuration:[Rn] 5f9 7s2

Californium- electron configuration:[Rn] 5f10 7s2

Einsteinium- electron configuration:[Rn]  5f11 7s2

Fermium- electron configuration:[Rn] 5f12 7s2

Mendelevium- electron configuration:[Rn] 5f13 7s2

Nobelium- electron configuration:[Rn] 5f14 7s2

Lawrencium- electron configuration:[Rn] 5f14 7s2 7p1