Actinides are called transuranic elements. Explain.

Explanation

### Step-by-Step Solution:

1. **Definition of Actinides**:
The actinides are a series of 15 chemical elements in the periodic table from actinium (Ac, atomic number 89) to lawrencium (Lr, atomic number 103).

2. **Understanding Transuranic Elements**:
Transuranic elements are defined as elements that have an atomic number greater than 92. The element with atomic number 92 is uranium (U), which is the heaviest naturally occurring element.

...