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Chem 1124Q, ALEKS Questions and Answers Graded A+
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Exam of 2 pages for the course ALEKS at ALEKS (Chem 1124Q, ALEKS)
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Chem 1124Q, ALEKSDeduce n (principle quantum number) and l (angular momentum quantum number) from
sub-shell label:
7s
3p
6d
4p - answer7, 0
3, 1
6, 2
4, 1
Define principle quantum number (n) - answern tells you how far from the nucleus the
electrons in the subshell are. Electrons in subshells with higher n are farther from the
nucleus, and more likely to participate in chemical reactions. The electrons in an atom
that have the highest n are called valence electrons.
Define angular momentum quantum number (l) - answerl tells you how many orbitals
are in a subshell. Since each electron orbital can hold two electrons, the number of
orbitals in a subshell tells you how many electrons the subshell can hold.
What is a photon? - answerThe fundamental particles of which electromagnetic
radiation is made.
The energy of a photon has a direct relation to it's _________. - answerfrequency
In photons, as frequency decreases, _____________ increases. - answerwavelength
Order these in frequency, then wavelength: radio waves, visible waves, gamma rays, x-
rays, microwaves, visible light, UV rays, infrared - answergamma rays, x-rays, UV rays,
visible waves, infrared, microwaves, radio waves
Opposite direction
What's the octet rule? - answerHydrogen needs one pair of electrons in outer shell to be
stable and other elements need four pairs of electrons in outer shell.
A Lewis structure shows what three things? - answerChemical symbol, valence pairing,
cation/anion
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