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Which of the following elements is a metalloid?
Sodium
Silicon
Sulfur
Silver
Silicon
Silicon (Si) is a metalloid because it possesses properties intermediate between metals and non-metals. While it appears shiny like a metal, it is brittle and acts as a semiconductor rather than a conductor.
Silicon (Si) is a metalloid because it possesses properties intermediate between metals and non-metals. While it appears shiny like a metal, it is brittle and acts as a semiconductor rather than a conductor.
Think of a metalloid like a bilingual person; they can communicate in the language of metals (conductivity) and the language of non-metals (brittleness/chemical bonding) depending on the situation.
B-Si-Ge-As-Sb-Te-Po (Big Snakes Get Angry So They Poison)
EgтАЛ тАФ Band gap energy which determines semiconducting behavior
╧Г=ne╬╝ тАФ The electrical conductivity formula for semiconductors
Metalloids sit along the 'zig-zag' line on the periodic table. Their electronic band structure features a small band gap, allowing them to act as conductors at high temperatures or under specific doping conditions, but as insulators at low temperatures.
Metalloids (semimetals) include Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium, and Polonium.
Silicon is the most abundant metalloid in the Earth's crust, primarily found in silicate minerals.
Silicon is the backbone of the modern electronics industry due to its tunable conductivity.
Tunable electrical conductivity through doping
High heat resistance compared to common metals
Inherently brittle and prone to fracturing
Lower electron mobility compared to pure metals
Semiconductor chips and integrated circuits
Solar photovoltaic cells
Atomic number of Silicon is 14.
Sodium is an alkali metal (Group 1).
Sulfur is a non-metal (Group 16).
Silver is a transition metal (Group 11).
B is correct тАФ Silicon is classified as a metalloid due to its intermediate electrical and physical properties.
Remember the 'staircase' of metalloids starting from Boron at group 13 to Polonium at group 16; this is a common target for elimination-based questions.
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