Identify the common name of group of elements based on following facts: Radioactive elements

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the common name of a group of elements that are radioactive.

2. **Identifying Radioactive Elements**: Radioactive elements are those that have unstable nuclei and emit radiation. They are often found in specific groups on the periodic table.

3. **Locating the Group on the Periodic Table**: The group of radioactive elements is primarily found in two series: the actinides and the lanthanides. However, the actinides are more commonly associated with radioactivity.

...