Which Period Does the Element 2 8 2 Belong To?

The element with configuration 2, 8, 2 belongs to Period 3 because it has 3 electron shells. This is Magnesium (Mg).

Configuration Analysis:

• 1st shell: 2 electrons
• 2nd shell: 8 electrons
• 3rd shell: 2 electrons
• Total shells: 3 → Period 3

Element Identification:

• Total electrons: 2 + 8 + 2 = 12
• Atomic number: 12
• Element: Magnesium (Mg)

Additional Properties:

• Group 2 (alkaline earth metal)
• Valence electrons: 2
• Reactive metal

Importants Points:

• Period: 3 (three electron shells)
• Element: Magnesium (Mg)
• Atomic number: 12