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THE BORON FAMILY-Boron(5)
-Aluminum(13)-Gallium(31)-Indium(49)
-Thallium(81)
Boron Family
3 Outer Valence Electrons Do not occur elementally in nature Are scarce in nature All metallic besides Boron(solid
metalloid) All soft and have a low melting point
except for Boron Chemically reactive at moderate
temperatures
Element no. 5Atomic weight- 10.811Color- Black/BrownishUsed for: fiberglass insulation, fertilization, road or
safety flares, wood preservatives, shields radiation, used as an insecticide
Boron
Aluminum
Atomic number 13 Metallic Uses: Aircraft, machinery, engine
blocks, engine components, tools, etc.
GALLIUM
Atomic Number 31 Color- Silvery White Classification- Metallic Used as a key component for LED
Lights and lasers
Indium
Atomic Number 49 Color- Silver Lustrous Gray Classification- Metallic Gives off a high pitched scream when
bent Useful for making low-melting alloys Produced mainly by Canada
Thallium
Atomic Number- 81 Color- Silvery White Classification- Metallic Resembles lead when left in open air Very soft and malleable, can be cut with
a knife Toxic and can cause cancer