# Which elements in the actinide series are transuranium elements?

Jan 5, 2017

#### Answer:

All elements numbered 93 to 103 (inclusive).

#### Explanation:

Uranium has atom number 92. All elements beyond 92 are called "trans-uranium". The actinide series goes up to 103, so the range is 93 (Np) to 103 (Lr).