6. Polar Covalent Molecules & Dot Structures

Flashcard maker : Kate Moore
Each molecule has a special shape and design.
true
: an unequal, unbalanced distribution of electrons in a molecule, causing different portions to possess partial positive and partial negative charges
polar
Electrons are always shared evenly during covalent bonding.
false
Molecular polarity is associated with covalent bonds.
true
The polarity of the HCl molecule is due to the: (Select all that apply.)
greater attraction of the chlorine nucleus for the shared electrons

shape of the molecule

large differences in electronegativity

Polarity in diatomic molecules results from the shared electrons spending more time near one of the atoms.
true
Why is the BrCl molecule polar?
The shared electrons are closer to Cl due to the greater electronegativity of chlorine.
Diatomic molecules will be nonpolar when a pair of shared electrons is located closer to one atom than the other.
false
H2, N2, O2 molecules:
must be nonpolar
Click to display the graph showing the relationship between polarity (P) and electronegativity difference (E.N.).
https://ignitiumwa.ignitiaschools.com/media/a_scichem_2015/5/pg23a.gif
HBr
3
I2
4
HF
1
HCl
5
Hl
2
Polar molecules have an equal number of positive and negative particles.
true
Molecules of three or more elements may be nonpolar if the geometric shape is:
symmetrical
The common water molecule is polar because:
it has an asymmetrical shape
Why is methane, CH4, a nonpolar compound?
The nonpolar bonds are distributed evenly around the carbon atom.
Looking at the figure, the overall molecule (SiO4), which forms the common mineral Quartz, has a tetrahedral shape. It is probably a:
nonpolar molecule
Complete the following question by making predictions based on the models in this chart:

Hint: Determine which group S is in.

bent

polar

Click through the electron dot symbols below to find the one that is drawn incorrectly. (Refer to the electron dot template above.)
https://ignitiumwa.ignitiaschools.com/media/a_scichem_2015/5/bdot2.gif

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