The element with configuration 2, 8, 4 is Silicon (Si), which is a metalloid (semi-metal)—neither a pure metal nor nonmetal.
Configuration Analysis:
- Total electrons: 2 + 8 + 4 = 14
- Atomic number: 14
- Element: Silicon (Si)
Classification:
- Type: Metalloid (semi-metal)
- Properties: Has characteristics of both metals and nonmetals
- Position: On the "staircase" line in the periodic table
Why Metalloid:
- Semiconductive properties (conducts electricity under certain conditions)
- Shiny like metals but brittle like nonmetals
- Forms covalent bonds like nonmetals
Importants Points:
- Element: Silicon (Si)
- Classification: Metalloid (not purely metal or nonmetal)
- Properties: Semiconductor, used in electronics