Lab: Ionic and Covalent Bonds — Unit test

Question 1

Geckos and water striders rely on forces between molecules. Which statement best identifies the forces involved?

Revolt · Accepted Answer

The type of force that water striders use is stronger than the type of force that geckos use.

Question 2

If the molecules of two different substances have a similar size but the molecules of one substance are polar while the molecules of the other substance are nonpolar, what is most likely true about the substances?

Revolt · Accepted Answer

The nonpolar substance has a lower boiling point than the polar substance.

Question 3

The diagram below shows a group of water molecules.The water molecules in the diagram are attracted to each other by

Revolt · Accepted Answer

hydrogen bonds.

Question 4

Which describes a step in the process of forming an ionic bond?

Revolt · Accepted Answer

A metal atom loses electrons and becomes a positive ion.

Question 5

Which reason best explains why metals are malleable?

Revolt · Accepted Answer

because they have delocalized electrons

Question 6

Which best describes why NH4+ can form an ionic bond with Cl–?

Revolt · Accepted Answer

Its positive charge is attracted to the negative charge of Cl–.

Question 7

Which statement about hydrogen bonds is true?

Revolt · Accepted Answer

They help water striders walk on water by creating surface tension.

Question 8

Which element has the lowest ionization energy?

Revolt · Accepted Answer

cesium (Cs)

Question 9

A plate of the steel hull of a ship develops a large crack when the ship strikes a reef. Analysis of the steel’s composition shows higher-than-normal levels of an element that could explain why the plate cracked instead of bending. Which element is most likely suspected?

Revolt · Accepted Answer

sulfur

Question 10

Which compound most likely contains polar covalent bonds?

Revolt · Accepted Answer

NF3

Lab: Ionic and Covalent Bonds — Unit test Answers

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