Flame Tests
Click on the correct answer.
1
What is able to be determined by flame tests?
the amount of substance present in a sample
whether or not carbon is present in a sample
whether or not an anion (negative ion) present in a sample
whether or not a metal cation (positive ion) is present in a sample
2
The carrier for the metal cation in this demonstration was
methanol
barium
water
sodium
potassium
3
The metal cations in this demonstration were dissolved in the methanol
in actual metal form
as salts which contained the metal cation of interest
as organic compounds
as liquids
4
Which of the following flame colors is matched correctly with its metal ion?
lithium cation---red flame
potassium cation---violet flame
sodium cation---green flame
calcium cation---orange flame
barium cation---yellow-green flame
5
Electrons of an atom reside in concentric spheres known as
nuclei
atomic orbitals
energy "shells"
cations
molecules
6
The principal quantum number for any electron
is assigned an integer
is correlated with the energy shell the electron is in
is lower the closer the electron is to the nucleus
is lower the lower the energy of the electron is
can be zero
7
When energy is supplied to an atom, the electron
does not react to the energy
moves from its energy shell to a lower energy shell
moves from its energy shell to a higher energy shell and stays there
moves from its energy shell to a higher energy shell then back again
none of the above
8
The excited state of an electron
puts it in an energy shell with a higher n value
puts it in a more stable energy state
puts it in a higher energy level
puts it in a less stable energy state
puts it in a lower energy level
9
When electrons move from the ground state to the excited state we say they have been
assisted
energized
promoted
demoted
discharged
10
The metal in a salt exists as
a neutral particle
a positive particle
a negative particle
a cation
an anion