Boron
By Bailee Hudson and Arianna Green
Information
History:
- discovered by French chemists, Joseph-Louis Gay-Lussac and Louis-Jaques Thenard and Sir Humphrey Davy in 1808.
- separated the boron by heating borax with potassium.
- solid at room temperature
- flammable
- metallic
- can produce infrared light
- pyrotechnics and flares to give off green light
- rockets as ignition source
- eye drops
- antiseptics
- tile glazes
- Boric Acid (H3BO3)
- Diborane (B2H6)
Periodic Table Information
Atomic Number: 5
Atomic Mass: 10.811
Protons: 5
Neutrons: 6
Electrons: 5
Nuclide Notation: 5/11 B
Hyphen Notation: B-11
Group Properties
- have three valence electrons
- have roles in the ecosystem
- soft texture
- good heat conductors
- high boiling points
- known to form trivalent oxides
Stoichiometry
Balanced Chemical Equation:
4B + 3O2(g) → 2B2O3(s)
Moles in 100 g of Boron:
100g|1 mol | = 9.25 mol
| 10.811 g|
Specific Heat
Specific Heat:
- 1.026 J/g*C
- 2565 J to change 100 g of boron 25*C
Melting Point:
- 2348 K
- 2075 *C
- 3767 *F
Boiling Point
- 4273 K
- 4000 *C
- 7232 *F
Acrostic Poem
B- boron is metallic
O- only non-metal in group 13
R- resistant to thermal expansion
O- optical characteristics include ability to transmit infrared light
N- named after the mineral borax
Types of Reactions
Synthesis
- 2B(s) + 3F2(g) → 2BF3(g)
Decomposition
- 2BCl3(g) → 2B(s) + 3Cl2(g)
Single Replacement
Double Replacement
Bonding
Compound
- B2O3
- Boron Trioxide
- 31% Boron, 69% Oxygen
Fluorine and boron - Fluor und Bor
Cites
- http://education.jlab.org/itselemental/ele005.html
- https://www.google.com/search?q=valence+electrons+boron&safe=strict&espv=2&biw=1920&bih=955&source=lnms&tbm=isch&sa=X&ved=0ahUKEwji_-n09b_JAhUBOD4KHRfxANgQ_AUIBigB#safe=strict&tbm=isch&q=boron+valence+electrons&imgrc=4etFKVqr4OgfgM%3A
- http://www.chemicalelements.com/elements/b.html
- http://www.rsc.org/periodic-table/element/5/boron
- http://www.chemicool.com/elements/boron.html
- http://crescentok.com/staff/jaskew/isr/ptable/5.htm
- https://en.wikipedia.org/wiki/Boron
- https://www.nlm.nih.gov/medlineplus/druginfo/natural/894.html