Unit 8.2 Gathering Evidence
Students learn the relationship between atomic structure
and light energy in atoms of metals and they learn how to
apply their knowledge to solve a real-world problem.
Video program cues: 5:05-16:00
Chemistry is central to life
"If I were in charge around here, I
would basically say that chemistry should be a compulsory
subject for every student in the U.S., whenever they can
take it, whether it be ninth grade, tenth, eleventh, or
twelfth grade. It's not because Im saying we need
lots more chemists, or everybody should be a chemist, its
because chemistry is a basic subject, and so many of the
things that happen around us in life happen because of chemistry.
Good things and bad things. And there are many societal
issues facing us today that do involve an understanding
of chemistry, in order to be solved. And they will be solved,
not just by chemists working with solutions, but also by
a whole array of people working on solutions."
American Chemical Society
Moore, J.W. (2001)' Supporting High School Chemistry Teaching,
'Journal of Chemical Education, Vol. 78, No. 12,
Chemistry is everywhere
"I think it is very underestimated today
how dependent we are and how friendly chemistry is: from
the clothes we wear to the food we eat, to the furniture
we sit on, to the cars we drive, chemistry is a central
science, it is critical to all of these things. We just
take it for granted. And at the same time, it is very unfortunate
that the word chemical, in these modern times, has a negative
connotation. I can guarantee you that we would all be dying
from Bubonic Plague and all sorts of other things, which
are terminal, if we threw all the chemistry that we know
out, and go back to the old style. It's a wonderful science,
it's got great applications, and it isnt as hard as
people say it is."
NASA Ames Research Center
Glowing pickle demonstration
Veatta Berry demonstrates the release of light energy produced
by passing electric current through a pickle.
Weimer, P.M.; Battino, R. (1996)' The Incredible "Glowing"
Pickle and Onion and Potato and..., 'Journal of Chemical
Education, Vol. 73, No. 5, pp: 456 (abs. only)
Energy levels laboratory
Veatta Berry’s students relate period numbers with
energy levels by doing flame tests for different metal salts.
Bare, W.D., Bradley, T., Pulliam, E. (1998)' An Improved
Method for Students' Flame Tests in Qualitative Analysis,
'Journal of Chemical Education, Vol. 75, No. 4, pp:
Flame test demonstration
Al DeGennaro teaches about energy levels, atomic structure
and real life applications in forensic chemistry.
McKelvy, G. M. (1998)' Flame Tests That Are Portable, Storable,
and Easy To Use, 'Journal of Chemical Education,
Vol. 75, No. 1, pp: 55-56.
to Unit 8.3