Chemical Bonding Quiz Exit ticket

What are compounds such as water, salt, and methane formed by?

What is the role of electrons in chemical bonds?

• A) Electrons repel each other to form bonds.

• B) Electrons are shared or transferred to achieve a full energy level.

• C) Electrons are irrelevant to chemical bonding.

• D) Electrons create a physical change.

What does the presence of chemical bonds in a molecule indicate?

• A) The physical state of the molecule.

• B) The specific arrangement of atoms
• C) That atoms are bonded together to form the mole
• D) The temperature at which the molecule reacts
• E) Energy is stored within the molecule.

Which molecule is given as an example to explain that a chemical structure does not show the strength of bonds between atoms?

• A) Water (H2O)

• B) Salt (NaCl)

• C) Methane (CH4)

• D) Phosphine (PH3)

What does the structural formula for PH3 indicate about the bonds between the hydrogen atoms and the phosphorus atom?

• They form a circular chain.

• They are directly bonded to the phosphorus atom.

• They are not bonded but float freely around the phosphorus atom.

• Hydrogen atoms are not present in the molecule.

What do the lines represent in a ball-and-stick model?

• Angles between bonds

• Electrons

• Atoms in the compound

• Bonds between atoms

What do the lines in a chemical structure diagram represent?

• Electrons

• Angles between bonds

• Atoms in the compound

• Bonds between atoms

What additional information does the ball-and-stick model provide about CHEMICAL BONDS compared to the structural formula?

• The type of elements involved

• The angles between the bonds

• The number of electrons

• The exact size of the atoms

How can the strength of chemical bonds be demonstrated in practical experiments?

• By measuring the boiling points of substances

• By observing the reaction rates of different substances

• By comparing the electrical conductivity of substances

• By counting the number of molecules in a substance

What does a space-filling model illustrate about chemical bonds?

• Bonds as lines between atoms

• Bonds by showing the spheres that represent atoms as disconnected

• Bonds by showing the spheres that represent atoms as either touching or slightly overlapping

• Bonds as fixed distances between atoms