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Compounds that
contain the element boron, such as
boric acid and sodium borate,
produce a green flame when a sample
of one of these compounds is placed
in a laboratory burner flame. If
this flame is viewed through a
spectroscope, a bright-line spectrum
is seen.
51
State how the bright-line spectra of
known elements can be used to
identify an unknown
element whose bright-line spectrum
was viewed through a spectroscope.
| Answer--> match
the spectra of the known
element to that of the
unknown element |
52 State, in
terms of electrons in shells,
why the electron configuration
2-2-1 is an excited state
electron configuration of a
boron atom.
| Answer--> the 3rd
shell contains an electron
when the electron should be
in the 2nd shell
(2-3 vs 2-2-1) |
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