2.1 Types of Chemical Bonds

Open Ended

What is the difference between ionic and covalent bonds (if you remember) from chemistry

Multiple Choice

Ionic or covalent?
Na  Br

• Ionic
• Covalent

Multiple Choice

Would the difference in electronegativity of atoms in an ionic bond be small or large?

• Small

• Large

​Why?

​The cation is very posititve: Low electronegativity
The anion is very negative: High electronegativity

Multiple Choice

Two pure elements react to form a compound. One element is an alkali metal, X, and the other is a halogen, Z. Which of the following is the most valid scientific claim that can be made about the compound?

• If has the formula XZ₂

• It does not dissolve in water

• It contains ionic bonds

• It contains covalent bonds

Multiple Choice

Ionic or covalent?
C  O

• Ionic
• Covalent

Multiple Choice

Ionic or covalent?
Na  F

• Ionic
• Covalent

Multiple Choice

Which of the following claims about the bond in the molecular compound HF is most likely to be true?

• There is a partial negative charge on the H atom

• Electrons are shared equally between H and F atoms

• The bond is extremely weak

• The bond is highly polar

Multiple Choice

The elements C and Se have the same electronegativity value, 2.55. Which of the following claims about the compound that forms from C and Se is most likely to be true?

• The carbon-to-selenium bond is unstable

• The carbon-to-selenium is nonpolar covalent

• The compound has the empirical formula CSe

• A molecule of the compound will have a partial negative charge on the carbon atom