Portage Learning Chemistry CHEM 103 Unit 5

Portage Learning Chemistry CHEM 103 Unit 5
Study online at https://quizlet.com/_d8619w

1. As33 (nonmetal = gain electrons) 1s2 2s2 What will be the charge of the ion formed from
2p6 3s2 3p6 4s2 3d10 4p3 each of these atoms? Explain your answer.
gain 3 ’ As-3
As33, Ge32
Ge32 (metal = lose electrons) 1s2 2s2 2p6
3s2 3p6 4s2 3d10 4p2
lose 4 ’ Ge+4

2. 1) Cl-O bond electronegativity difference Using the electronegativity values from the
= 3.5 - 3.0 = 0.5 equation bank, show the determination of the
(1.6 - 0.5 bond is Polar) polarity of each different type of bond in the
H-O bond electronegativity difference = following molecules:
3.5 - 2.1 = 1.4
(1.6 - 0.5 bond is Polar)
2) Ca
N bond electronegativity difference =
3.0 - 2.5 = 0.5
(1.6 - 0.5 bond is Polar)
H-C bond electronegativity difference =
2.5 - 2.1 = 0.4
(< 0.5 bond is Nonpolar)

3. Your Answer: Write Lewis dot structures for the following
NH3 molecules:
N = 5, H = 3, 8 total
H NH3
.. SO2
H:N:H CH3OH
.. HNO2
SO2 N2
S = 6, O = 12, total = 18 CH2O
.. .. ..
: O : S :: O
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, Portage Learning Chemistry CHEM 103 Unit 5
Study online at https://quizlet.com/_d8619w

.. ..

CH3OH
C = 4, H = 4, O = 6, total = 14
H
.. ..
H:C:O:H
.. ..
H
HNO2
H = 1, N = 5, O = 12, total = 18
.. .. ..
H:O:N::O:
..
N2
N = 10
: N ::: N :
CH2O
C = 4, H = 2, O = 6, total = 12
.. ..
H : C :: O : H

4. 1.) PH3 4 Groups of electrons around P = Determine and explain for each of the mate-
Tetrahedral Electron Geometry rials below (a) Electron geometry of a Central
Tetrahedral Electron Geometry = sp3 Hy- atom, (b) Hybridization of a Central atom, (c)
bridization of P Shape of the Molecule, (d) Molecular Polarity
3 atoms around central Tetrahedral atom
= Triangular pyramid shape 1.) PH3
P-H bond (2.1-2.1) is nonpolar = all non-
2.) HCN
polar bonds = Nonpolar molecular polar-
ity


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