Answers TX-Integrated Physics and Chemistry A-CRUnit Test

Ionic Bonds Answers

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Ionic compounds form

crystal structures.

molecular structures.

pure elements.

neutral elements.

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What will most likely occur if sulfur forms an ionic bond with another element? (Click on the icon for the periodic table to view sulfur)

Sulfur will accept electrons.

Sulfur will donate electrons.

Sulfur will become a positive ion.

Sulfur will become less stable.

This chart shows characteristics of three different types of atoms.

Atom X will donate electrons to Atom Y.

Atom X will accept electrons from Atom Y.

Atom Y will accept electrons from Atom Z.

Atom Z will donate electrons to Atom X.

Iodine and potassium form an ionic bond. Iodine has seven electrons in its outer shell, and potassium has one electron in its outer shell. Which conclusion is best supported by this information?

Iodine is a noble gas.

Potassium is a nonmetal.

Iodine becomes an ion with a negative 1 charge.

Potassium becomes an ion with a positive 7 charge.

What is formed when polyatomic ions bond with other ions?

ionic compounds

neutral compounds

ionic elements

neutral elements

Which characteristic(s) makes ionic compounds useful as a building material?

low melting and boiling points

hardness and brittleness

inability to conduct electricity

inability to dissolve in water

David observed properties of four different compounds, only one of which is an ionic compound. His observations are shown in the chart.

Which product relies on the ability of ionic compounds to conduct electricity?

paper

batteries

soap

glazed pottery

Anna stated that ionic compounds have high melting points and low boiling points. She said that this demonstrates that ionic compounds have strong bonds because a lot of energy is needed to break the electrical forces that hold the bonds together.Which statement best describes Anna’s error?

Strong electrical forces will make ionic compounds have high boiling points.

Strong electrical forces will make ionic compounds have weak bonds.

A low amount of energy is needed to break the bonds in ionic compounds.

Gravitational forces hold the bonds together in ionic compounds.

These diagrams show two atoms of fluorine and an atom of magnesium.

A magnesium atom accepts six electrons from the fluorine atoms → Each fluorine atom donates three of the electrons → The magnesium atom becomes a -2 ion → Each fluorine atom becomes a +1 ion

A magnesium atom donates two electrons to the fluorine atoms → Each fluorine atom accepts one of the electrons → The magnesium atom becomes a -2 ion → Each fluorine atom becomes a +1 ion

A magnesium atom accepts two electrons from the fluorine atoms → Each fluorine atom donates one of the electrons → The magnesium atom becomes a -2 ion → Each fluorine atom becomes a +1 ion

A magnesium atom donates two electrons to the fluorine atoms → Each fluorine atom accepts one of the electrons → The magnesium atom becomes a +2 ion → Each fluorine atom becomes a -1 ion

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