Ionic vs Covalent

Using the model for the formation of Scandium Fluoride (an ionic compound), write the chemical formula.

• Sc₃F

• Sc₃F₃

• Sc₊₃F_-1

• ScF₃

Why are there two sodiums (Na), in the formation of this ionic compound?

• There always has to be 2 metals

• The overall charge needs to add up to 4

• The overall charge has to be 0

• It needs to have more metal atoms than nonmetal

The reason that a sodium atom bonds with a chlorine atom is because

• Sodium transfers an electron to Chlorine
• oppositely charged ions form a strong electrostatic attraction
• ions are the same size
• the ions have a full outer shell

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Ionic compounds conduct electricity when dissolved in water. Which statement below best explains the property?

• Ions are free to move.

• Electrons are free to move.

• Bonds are strong.

• There are weak intermolecular forces of attraction.

Tags

NGSS.HS-PS1-3

Which of the following is a property of an ionic compound?

• high melting point
• soft
• malleable
• liquid at room temperature

The following properties are all characteristics of ionic compounds EXCEPT

• high melting and boiling points

• soft

• crystal lattice structure

• conduct electricity when dissolved in water

Tags

NGSS.HS-PS1-3

When dissolved in water, the solution does NOT conduct electricity.

• ionic compounds

• covalent compounds

Formed when a non-metal shares electrons with another non-metal.

• ionic compound

• covalent compound

Which of the following is a molecular compound?

• CaO (metal + nonmetal)

• NaCl (metal + nonmetal)

• CaCl₂ (metal + nonmetal)

• CH₄ (nonmetal + nonmetal)

Tags

NGSS.MS-PS1-1

Compounds composed of a ______________ and _____________ like the compound CaCl₂ , are ionic compounds.

• metal ... metal

• nonmetal ... nonmetal

• metal ... nonmetal