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Nextorg.concord.mw2d.activity.AtomContainerPg 1 Dissolving explanation$0.mmlorg.concord.modeler.PageTextBox400.0400.0<html>
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Important concepts to understand in this unit include distinguishing
between types of substances. We will be discussing two main types: ionic
and molecular. This model contains at least one example of each. An ionic
compound is represented in the top container and is shown as charged
atoms, known as ions. Note that all of the blue ions carry a + charge and
all of the green atoms carry a - charge. The bottom two containers
represent two different types of molecular substances. Molecules are held
together by covalent bonds resulting from the sharing of electrons. Note
that the container to the lower left contains molecules that show no
charge. These are known as nonpolar covalent molecules and result from a
bond in which the atoms involved have a relatively equal attraction for
the bonding electrons. The container on the lower right contains polar
covalent molecules. In this type of interaction, one of the bonding atoms
has a greater attraction for the electrons, so the electrons are shared
unequally resulting in a charge separation known as a dipole moment. In
some simulations covalent compounds will be represented by ellipses.
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falseorg.concord.modeler.PageMultipleChoicetrue4600200<html>
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1. Which of the following is true?
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trueMetals form cations which are - and nonmetals form anions which are +Metals form cations which are + and nonmetals form anions which are -Metals form anions which are - and nonmetals form cations which are +Nonmetals form cations which are - and metals form anions which are +1falseLineorg.concord.modeler.PageMultipleChoicetrue4500200<html>
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2. Covalent bonds occur between...
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trueTwo nonmetals in which the electrons are shared equally.Two nonmetals in which the electrons are shared unequally.A metal and a nonmetal.Both A and B are correct.3falseLineorg.concord.modeler.PageTextField400200<html>
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3. What is a dipole moment and what do they result from?
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falseorg.concord.modeler.PageTextField400200<html>
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4. Does water have a dipole moment? Explain why or why not.
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falseorg.concord.modeler.PageTextField400200<html>
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5. Give an example of each of the following compounds: Ionic, Nonpolar
Covalent, Polar Covalent
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falsePg 2 Determining what else dissolves in water.cml