lindsey ipson, mike napoli, emma foxperiod 8. boron (#5) element symbol: b electron configuration:...
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The Boron Group (#13)
Lindsey Ipson, Mike Napoli, Emma FoxPeriod 8
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Boron (#5)• Element Symbol: B• Electron configuration: 1s2
2s2 2p1• Boron is a solid at room
temperature• Is a metalloid• Hard texture• Poor conductor• Melting Point: 2349 K
(2076°C, 3769°F)• It is inert• Never found free in nature• Used as a lubricant• ***Did you know?***• Boron nitrate, a boron
compound, can be used to make materials that are almost as hard as diamonds!
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Aluminum (#13)• Element Symbol: Al• Electron Configuration: 1s2 2s2 2p6 3s2
3p1• Solid at room temperature• Is a metal• Hard but malleable, lightweight but
strong• Melting Point: 933.47 K, (660.32 °C,
1220.58 ° F)• Good conductor of heat and electricity• Aluminum is extremely reactive, even
under normal conditions• Occasionally found in its free state in
nature, but mostly as a compound• Uses: kitchenware, aluminum foil,
airplanes, boats• ***Did you know?***• There is more aluminum in the Earth’s
crust than any other metal.
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Gallium (#31)• Element Symbol: Ga• Electron Configuration: 1s2 2s2 2p6
3s2 3p6 4s2 3d10 4p1• Solid at room temperature• Is a metal• Brittle• Not found in nature in its free state• Melting point 302.9146 K (29.7646°C,
85.5763°F)• Decent conductor (not the best or
worst)• Somewhat reactive with alkali metals
and acids• Uses: Effulgent mirrors, some
thermometers• ***Did you know?***
Gallium will melt if held in the human hand.
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Indium (#49)
• Element Symbol: In• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p1 • Solid at room temperature• Metal• Very soft, one of the softest known metals• Rarely found in nature in its free state, found mostly in
compounds• Melting Point: 156.6• Conducts heat• Not radioactive• Inert• Uses: engine lubricant,
video/laptop/computer/television screens• ***Did you know???***Indium produces a “screaming” sound when it is bent, and it writes like a pencil. Also, it is softer than lead.
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Thallium (#81)• Element Symbol: Tl• Electron configuration: [Xe] 6s2 4f14
5d10 6p1• Solid at room temperature• Soft-can be cut with knife• Melting Point: 304° C• Good conductor at room temperature• Only found in compound form, not found
free naturally• Uses: Treats infections and ringworms,
makes some glasses, ant/rodent poison• Highly reactive, erodes in contact with air• ***Did you know?***
Thallium was discovered by Sir William Crookes, and it is very poisonous and suspected of being used in some murder cases.
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ConclusionThe Boron group consists of mostly metals,
with one metalloid.
They are not usually found in nature in their free states.
Their most common uses are for machines and appliances.