6. Polar Covalent Molecules & Dot Structures – Flashcards
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Each molecule has a special shape and design.
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true
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: an unequal, unbalanced distribution of electrons in a molecule, causing different portions to possess partial positive and partial negative charges
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polar
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Electrons are always shared evenly during covalent bonding.
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false
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Molecular polarity is associated with covalent bonds.
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true
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The polarity of the HCl molecule is due to the: (Select all that apply.)
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greater attraction of the chlorine nucleus for the shared electrons shape of the molecule large differences in electronegativity
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Polarity in diatomic molecules results from the shared electrons spending more time near one of the atoms.
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true
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Why is the BrCl molecule polar?
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The shared electrons are closer to Cl due to the greater electronegativity of chlorine.
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Diatomic molecules will be nonpolar when a pair of shared electrons is located closer to one atom than the other.
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false
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H2, N2, O2 molecules:
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must be nonpolar
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Click to display the graph showing the relationship between polarity (P) and electronegativity difference (E.N.).
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https://ignitiumwa.ignitiaschools.com/media/a_scichem_2015/5/pg23a.gif
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HBr
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3
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I2
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4
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HF
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1
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HCl
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5
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Hl
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2
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Polar molecules have an equal number of positive and negative particles.
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true
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Molecules of three or more elements may be nonpolar if the geometric shape is:
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symmetrical
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The common water molecule is polar because:
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it has an asymmetrical shape
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Why is methane, CH4, a nonpolar compound?
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The nonpolar bonds are distributed evenly around the carbon atom.
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Looking at the figure, the overall molecule (SiO4), which forms the common mineral Quartz, has a tetrahedral shape. It is probably a:
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nonpolar molecule
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Complete the following question by making predictions based on the models in this chart: Hint: Determine which group S is in.
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bent polar
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Click through the electron dot symbols below to find the one that is drawn incorrectly. (Refer to the electron dot template above.)
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https://ignitiumwa.ignitiaschools.com/media/a_scichem_2015/5/bdot2.gif
