AP Chem Unit 2 Quiz review

Which of the following are covalent compounds?

• Zn²⁺

• CH₂O

• NH₄⁺

• NaI

• F₂

Which of the following bonds will be most polar?

• Si-O

• C-H

• O-O

• B-F

Tags

NGSS.HS-PS1-2

Which of the following best explains why copper conducts electricity?

• It can have two or three valence electrons

• It has delocalized electrons that can flow in a circuit

• It is a transition metal

• It has a low electronegativity

Tags

NGSS.HS-PS1-3

Atoms are most likely to form a bond:

• When they are at the lowest potential energy possible

• When they are at the highest potential energy possible

• When they are opposite charges

• When they are close enough for valence electrons to be attracted to the other atom's nucleus

• When they are so close their nuclei are touching

Which structure consists of a giant lattice of cations and anions held together by strong electrostatic forces of attraction?

• ionic bonding

• metallic bonding

• covalent bonding

Tags

NGSS.HS-PS1-3

Which of the following types of bonding results in materials which have the highest melting and boiling points?

• ionic bonding

• metallic bonding

• covalent bonding

Name this technique: Heating a substance, allowing it to cool in a desiccator, weighing it and repeating the steps until no further changes in mass observed.

• Weighing boat analysis

• Weighing by difference

• Weighing accurately and approximately

• Heating to constant mass

How would coulombic forces affect physical properties of a molecule such as boiling (BP) and melting point(MP)?

• Higher coulombic forces would lead to lower BP and MP

• Higher coulombic forces would lead to higher BP and MP

• Higher coulombic forces would lead to higher BP ,but a lower MP

• Lower coulombic forces would lead to higher BP and MP

Tags

NGSS.HS-PS2-4

Which color graph would be the plot for the molecule with the largest atomic radius

• purple graph

• blue graph

• red graph

What is the correct Lewis Dot Structure for ammonia NH3

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1