By Liyan Tay, Alan Hu, HaeBin Kim

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Presentation transcript:

By Liyan Tay, Alan Hu, HaeBin Kim Metalloids By Liyan Tay, Alan Hu, HaeBin Kim

Hi, I’m Mr. Metalloid Inbetween, I’m half metal and half nonmetal. Hi, I’m the Ms.NonMetal Hi, I’m the Mr. Metal Metalloids: an element with both the properties of metals and non metals

Electricity/ Heat Metalloids are characterized by being ‘semi-conductors’ Semi-conductor: a substance that has an electrical conductivity depending on the temperature, exposure to light, or presence of small amount of impurities Conditions Electricity/ Heat Conditions

Boron The Periodic Table Silicon Arsenic Germanium Astatine Tellurium

Physical Properties -behave as electrical insulators at room temperature but become electrical conductors (when heated or when small quantities of certain elements are mixed together) -good conductors of heat and electricity, but not as well as metals -Malleable -Solid -Ductile -Brittle

Chemical Properties

Metalloids Chemical Property 1: Metals Metalloids Non Metals Si (Silicon) Electron Configuration: 2, 8, 4 O (Oxygen) Electron Configuration: 2, 6 Fe (Iron) Electron configuration: 2,8,14,2 Chemical Property 1: have nearly empty outer electron shells of the typical metals and the nearly filled electron shells of the nonmetals.

Chemical Property 2: Have enough empty electron orbital into which electrons can be moved to conduct electric current B (Boron) Valence: 3 Si (Silicon) Valence: 4 Ge (Germanium) Valence: 4

Such as… - Cu (Copper) - Fe (Iron) Chemical Property 3: Tends to form an alloy with a metal Such as… - Cu (Copper) - Fe (Iron)

Interesting Facts Boron Compounds can kill in a matter of seconds if contacted with bare skin Silicon is the 7th most abundant element on earth, and second most abundant element in earth’s crust Tellurium forms many compounds, but none of them are commercially important

Interesting Facts The total amount of astatine in the earth’s crust at any particular time is less than 30 grams Historians suggest that Napoleon Bonaparte was killed by arsenic poisoning

Sources http://www.wwnorton.com/chemistry/concepts/chapter1/ch1_1.htm http://www.lenntech.com/Periodic-chart-elements/Si-en.htm http://www.answers.com/metalloids http://web.buddyproject.org/web017/web017/metals.htm