Chemistry Maury High School October 7th, 2010 FVCproductions https://fvcproductions.com

1. Boron
10
Frances and Maleonell
Chemistry
Blocks 5+6
Robertson

2. Half Life
The half life of Boron-10 is considered “stable” with 5
neutrons.
Therefore, it’s half life is “not available”.
Boron only has two stable isotopes- Boron 10 and Boron
11.

3. Percent Abundance
The percent natural abundance of boron 10 is 19.8%,
so about 20%.
Again, there are only two naturally occurring
isotopes. The mass of boron-10 is 10.01294 and the
mass of boron-11 is 11.00931.
You can use the atomic mass of boron to calculate
the relative abundance of boron-10.

4. Decay Pathway
Boron 10 does not have a decay pathway because its half
life is stable, therefore the decay pathway does not exist.
Boron has two naturally occurring and stable isotopes, 11
B
(80.1%) and 10
B (19.9%). Boron 10 and Boron 11 have
neither a decay pathway or a half life because of this
once again.
There are 13 known isotopes of boron, the shortest-lived
isotope is 7
B which decays through proton emission and
alpha decay. It has a half-life of 3.5×10−22
s.

5. Daily Uses
Large amounts of sodium borate pentahyde (Na2B4O7·5H2O)
(which is a compound involving boron) are used in the
manufacture of fiberglass insulation and sodium perborate
bleach.
Boric acid (H3BO3) is used to manufacture textile fiberglass
and is used in cellulose insulation as a flame retardant.
Borax (Na2B4O7·10H2O) is used in laundry products and as a
mild antiseptic.
Other boron compounds are used to make borosilicate glasses,
enamels for covering steel and as a potential medicine for
treating arthritis.

6. How Boron is Used in
Medicine...
Used in both radiation shielding and in boron neutron capture therapy.
People take boron supplements as medicine.
Used for building strong bones, treating osteoarthritis, as an aid for building muscles and increasing
testosterone levels, and for improving thinking skills and muscle coordination.
Women sometimes use capsules containing boric acid, the most common form of boron, inside the vagina to
treat yeast infections.
People apply boric acid to the skin as an astringent or to prevent infection; or use it as an eye wash.
Used as a food preservative between 1870 and 1920, and during World Wars I and II.
Affects the way the body handles other minerals such as magnesium and phosphorus.
Increases estrogen levels in older women and healthy men. Estrogen is thought to be helpful in maintaining
healthy bones and mental function.
Boric acid can kill yeast that cause vaginal infections.

7. Some Interesting Facts!
Prunes, dates, raisins and honey, nuts, fresh fruit such
as grapes and pears, green leafy vegetables and beans
are good sources of Boron.
Boron helps regulate body’s use of calcium, phosphorus,
and magnesium.
Helps prevent abnormalities in growth.
Taking high dosages for a long time can lead to
reduced fertility for men!
Also enhances brain function and even memory!

8. Model
Boron-10
B
E
N
P
P
P
P
P
Protons-5
Neutrons-5
Electrons-5
N
N
N
N
E
E
E
E

9. Boron
Umate
Cubic
Boron
Nitride
Hexagonal Boron
Nitride
Pictures
http://www.elementsdatabase.com/Boron-B-5-element/
http://answers.yahoo.com/question/index?
qid=20080209142748AAv5BsS

10. References
http://www.elementsdatabase.com/Boron-B-5-element/
http://answers.yahoo.com/question/index?qid=20080209142748AAv5BsS
http://www.wwsuperabrasives.com/images/superabrasives/
Cubic_Boron_Nitride_BMO.jpg
http://imgs.tootoo.com/4a/04/4a0441719b808e41016e9d18708e493b.jpg
http://cnreachem.en.made-in-china.com/product/OohnAyBjLfrs/China-Hexagonal-
Boron-Nitride-HBN-.html
http://naturalmedicine.about.com/od/herbs/boron.htm
http://www.wolframalpha.com/entities/isotopes/boron_10/qn/0l/o4/
http://education.jlab.org/itselemental/iso005.html
http://www.nlm.nih.gov/medlineplus/druginfo/natural/894.html

11. Thanks For Watching!
Music Provided by Yo-Yo Ma
Cello Suite No.1 in G Major