What is the biggest element?

Based on the provided reference, the biggest element of the periodic table is Francium (Fr).

Francium is a naturally occurring and radioactive element that belongs to the alkali metals. Here's a breakdown:

• Element: Francium (Fr)
• Type: Alkali Metal
• Characteristics: Naturally occurring, Radioactive
• Group: 1
• Period: 7
• Electronic Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s¹