The element with electron configuration 2, 8, 8, 2 is Calcium (Ca), with atomic number 20.
Configuration Breakdown:
- 1st shell: 2 electrons
- 2nd shell: 8 electrons
- 3rd shell: 8 electrons
- 4th shell: 2 electrons
- Total: 2 + 8 + 8 + 2 = 20 electrons
Element Properties:
- Name: Calcium
- Symbol: Ca
- Atomic number: 20
- Period: 4 (four shells)
- Group: 2 (alkaline earth metal)
- Valence electrons: 2 (in outermost shell)
Characteristics:
- Reactive metal
- Forms Ca²⁺ ions easily
- Essential for bones and teeth
Importants Points:
- Element: Calcium (Ca)
- Atomic number: 20
- Classification: Period 4, Group 2 metal