Presentation on theme: "-Boron(5) -Aluminum(13) -Gallium(31) -Indium(49) -Thallium(81)"— Presentation transcript:
1 -Boron(5) -Aluminum(13) -Gallium(31) -Indium(49) -Thallium(81) The Boron Family-Boron(5)-Aluminum(13)-Gallium(31)-Indium(49)-Thallium(81)
2 Boron Family 3 Outer Valence Electrons Do not occur elementally in natureAre scarce in natureAll metallic besides Boron(solid metalloid)All soft and have a low melting point except for BoronChemically reactive at moderate temperatures
3 Boron Element no. 5 Atomic weight- 10.811 Color- Black/Brownish Used for:fiberglass insulation, fertilization, road or safety flares, wood preservatives, shields radiation, used as an insecticide
4 Aluminum Atomic number 13 Metallic Uses: Aircraft, machinery, engine blocks, engine components, tools, etc.
5 Gallium Atomic Number 31 Color- Silvery White Classification- Metallic Used as a key component for LED Lights and lasers
6 Indium Atomic Number 49 Color- Silver Lustrous Gray Classification- MetallicGives off a high pitched scream when bentUseful for making low-melting alloysProduced mainly by Canada
7 Thallium Atomic Number- 81 Color- Silvery White Classification- MetallicResembles lead when left in open airVery soft and malleable, can be cut with a knifeToxic and can cause cancer