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WorksheetsPolar Nonpolar Soluble
Total questions: 25
Worksheet time: 13mins
In order to help us make a little more sense of the chemical world, humans naturally tend to ___
jumble and scatter
classify and categorize
shimmy and shake
combine and conquer
Water, H2O, is classified as what type of molecule?
a polar molecule
a nonpolar molecule
a coordinate covalent compound
an ionic compound
The various chemicals that make up butter are generally ___
polar
nonpolar
soluble in water
ionic compounds
A molecule made up entirely of the same element will have an electron distribution that is ___
completely symmetrical
asymmetrical
decreasing from left to right
polar
What is the measure of the tendency of an atom to attract bonding electrons called?
ionization energy
electron charisma
dipole momentum
electronegativity
Electronegativity increases from left to right on the periodic table because there are ___
fewer protons in the atoms
more protons in the atoms
fewer electron shells
more electron shells
Electronegativity decreases as you move from top to bottom on the periodic table because ___
the increased electrons shield each other from the protons
there are more protons in the atoms
there are fewer electron shells
of the asymmetrical electron distribution
Which elements are the "superstars of electronegativity-fame"?
iron, nickel, copper, silver and gold
oxygen, nitrogen, fluorine, chlorine, and bromine
boron, carbon, oxygen, nitrogen, and fluorine
lithium, sodium, potassium, rubidium, and cesium
For polarity to occur in a bond, you need two elements with a difference in their electronegativities of ___
0.5 or less
between 0.5 and 1.6
less than 1.6
greater than 1.6
CO2 has charge asymmetry, but is not a polar molecule because it's ___
linear
bent
tetrahedral
trigonal pyramidal
Methane, CH4, has polar bonds but is not a polar molecule because ___
of geometrical asymmetry
of geometrical symmetry
it's linear
of no electronegativity differences
The separation of the charge around a molecule into a more positive area and a more negative area creates ___
a polar vortex
a dipole moment
a magnetic monopole
a magnetic dipole
The dipole moment is represented by an arrow with a plus sign at the tail pointing toward ___
a fluorine atom
the negative side of the molecule
magnetic north
the least electronegative element
A little lowercase delta plus (δ+) or delta minus (δ–) by the individual atoms signify ___
partial charges
the magnetic poles
a difference in electronegativities
nonpolar molecules
Liquids made up of polar molecules are really good at dissolving ___
metallic solids
lipids and fats
molecular solids
solids composed of polar or ionic compounds
Polarity taken to the extreme, where the electrons have completely transferred, creates ___
radioactive isotopes
an ultrapolar molecule
two charged ions
a molecular compound
The oxygen sides of water are always doing their best to orient themselves toward ___
magnetic north
the hydrogen sides of other molecules
negative ions
the surface of a liquid
The attractive intermolecular forces that pull molecules of a liquid together are called ___
adhesive forces
cohesive forces
covalent bonds
polar covalent bonds
Water doesn't mix with oil because, rather than the water disliking the oil, it actually ___
absorbs the oil
likes it a bit too much
likes itself much more
chemically reacts with the oil
What are the loose, somewhat fleeting, intermolecular bonds between water molecules called?
hydrogen bonds
oxygen bonds
water bonds
polar covalent bonds
Due to the arrangement of hydrogen bonds, a volume of ice is how much larger than the same mass of water?
about 5% larger
about 10% larger
about 15% larger
more than 20% larger
When ice melts, what percent of O's and H's are still engaged in hydrogen bonding?
about 50%
about 65%
about 80%
about 95%
At what temperature does water have its highest density?
-4 °C
0 °C
4 °C
8 °C
There are lots of different molecules, like the surfactants in soap, that have both ___
polar and nonpolar areas
covalent and ionic bonds
cohesive and adhesive forces
hydrogen and oxygen bonds
The fatty acids that make up your cell membranes have ___
polar heads and tails
nonpolar heads and tails
polar heads but nonpolar tails
nonpolar heads but polar tails
