Unit 3 Quiz: Chemical Bonding

What is a cation?

• a. A positively charged ion
• b. A negatively charged ion
• c. A neutral particle
• d. An ion with no charge

2. Which of the following is an example of an anion?

• a. Na+
• b. Cl-
• c. Ca2+
• d. Al3+

Which type of bond forms between a metal and a non-metal?

• a. Covalent bond
• b. Metallic bond
• c. Ionic bond
• d. Hydrogen bond

What characterizes covalent bonds?

• a. Transfer of electrons
• b. Sharing of electrons
• c. Sea of electrons
• d. Attraction between ions

Which of the following compounds is an example of an ionic bond? (HINT: Break down the compound and decide if each element is a METAL or NONMETAL)

• a. H2O
• b. NaCl
• c. CO2
• d. CH4

Which molecule is non-polar? (HINT: On your scratch paper, draw the VESPR shape for each molecule)

• a. BF3
• b. H2O
• c. CO2
• d. HF

What is the VSEPR shape of a molecule with two electron-dense areas and no lone pairs? (HINT: use your VESPR chart!)

• a. Linear
• b. Trigonal planar
• c. Tetrahedral
• d. Bent

8. In metallic bonds, what is the role of electrons?

• a. Electrons are transferred from one atom to another
• b. Electrons are shared between two atoms
• c. Electrons form a "sea" that flows around metal ions
• d. Electrons are localized in specific orbitals

What is the VSEPR shape of a molecule with four electron-dense areas and no lone pairs?

• a. Trigonal planar
• b. Tetrahedral
• c. Bent
• d. Linear

Which molecule has a trigonal planar shape?

• a. CH4
• b. BF3
• c. NH3
• d. H2O