Holt Ch 6 Ppt

Open Ended

Explain how bond length is related to the stability of a molecule, using the example of hydrogen nuclei.

Open Ended

Explain the relationships among potential energy, distance between approaching atoms, bond length, and bond energy in covalent bonding.

Multiple Choice

Which of the following best describes what happens when atoms get close to each other?

• Their outer electrons repel each other, but are also attracted to the nuclei of other atoms.

• They merge into a single atom.

• They lose all their electrons.

• They immediately form a new substance.

Fill in the Blank

The energy required to break a chemical bond and form neutral isolated atoms is called ___ energy.

Fill in the Blank

The atom with the larger ___ will be the more-negative atom in a bond.

Open Ended

How does the attraction between outer electrons and nuclei of surrounding atoms influence the type of chemical bond formed?

Multiple Choice

Based on the electronegativity differences, which of the following pairs forms an ionic bond?

• Sulfur and hydrogen

• Sulfur and cesium

• Sulfur and chlorine

• Hydrogen and chlorine

Open Ended

Use the electronegativity values to classify the bonding between sulfur and hydrogen, cesium, and chlorine. In each pair, which atom will be more negative?

Multiple Choice

Which of the following best describes the difference between ionic and covalent bonding?

• Ionic bonding involves the transfer of electrons, while covalent bonding involves the sharing of electrons.

• Ionic bonding involves the sharing of electrons, while covalent bonding involves the transfer of electrons.

• Both ionic and covalent bonding involve the sharing of electrons.

• Both ionic and covalent bonding involve the transfer of electrons.

Multiple Choice

Which of the following is NOT a reason why scientists use resonance structures to represent some molecules?

• To show the delocalization of electrons

• To represent molecules with multiple valid Lewis structures

• To indicate the presence of ionic bonds

• To more accurately depict the bonding in certain molecules

Multiple Choice

What is the main force that holds two atoms together in a covalent bond?

• Attraction between nuclei and electron clouds

• Repulsion between electron clouds

• Repulsion between nuclei

• Attraction between electron clouds

Multiple Choice

Which of the following best describes a molecular compound?

• A chemical compound whose simplest units are molecules

• A compound composed of ions

• A mixture of elements

• A compound held together by ionic bonds

Multiple Select

Which of the following pairs have a bond energy greater than 400 kJ/mol?

• H–F

• O–O

• H–H

• C–Br

Multiple Select

Which of the following are examples of molecules as shown in the diagram?

• Water (H2O)

• Oxygen (O2)

• Sucrose (C12H22O11)

• Sodium (Na)

Fill in the Blank

A chemical formula indicates the relative numbers of atoms of each kind in a chemical compound by using atomic symbols and numerical ___.

Multiple Choice

Which type of molecule consists of more than two atoms?

• Monatomic

• Diatomic

• Polyatomic

• Ionic

Open Ended

Explain how potential energy changes during the formation of a hydrogen-hydrogen bond, as shown in the figure.

Multiple Choice

What two forces are involved in the formation of a covalent bond between two atoms?

• Attraction between electrons and protons, and repulsion between nuclei and electrons

• Attraction between nuclei, and repulsion between electrons

• Attraction between electrons, and repulsion between protons

• Attraction between electron clouds, and repulsion between nuclei

Open Ended

Explain why boron does not follow the octet rule when forming bonds. Use information from the slides to support your answer.

Multiple Choice

Which of the following elements is an exception to the octet rule because it is surrounded by only two electrons when it forms bonds?

• Hydrogen

• Boron

• Oxygen

• Carbon

Multiple Select

Which of the following statements about electron-dot notation are correct?

• It shows only the valence electrons of an atom.

• It uses dots placed around the element's symbol.

• It shows both inner-shell and valence electrons.

• It is helpful for keeping track of valence electrons.

Fill in the Blank

The electron-dot notation for nitrogen is ___ .

Multiple Choice

In a Lewis structure, what does a pair of dots between two atomic symbols represent?

• A shared electron pair (covalent bond)

• A lone pair of electrons

• A double bond

• An ionic bond

Open Ended

What questions do you still have about how atoms interact to form chemical bonds?

Multiple Choice

How does the attraction between outer electrons and nuclei of surrounding atoms influence chemical bonding?

• It determines the kind of chemical bond formed between atoms.

• It has no effect on chemical bonding.

• It only affects the size of the atom.

• It causes atoms to lose all their electrons.