Ions and Ionic Compounds

Which properties are all characteristics of ionic compounds?

• solids with high melting and boiling points

• soft solids which are highly malleable

• when solid, the ions are held in place so the compounds cannot conduct electricity

• conduct electricity when dissolved or molten

Tags

NGSS.MS-PS1-1

What properties does an ionic compound have?

• A low boiling point and it conducts electricity when dissolved in water

• A high melting point and it conducts electricity when molten or dissolved

• A high boiling point and it conducts electricity when solid

Tags

NGSS.MS-PS1-1

Why do ionic compounds NOT conduct electricity when they are in their solid state?

• Their ions are free to move.

• Their ions are held in fixed positions.

• Their electrons are free to move

• Their electrons are held in a fixed state

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.

Why do ionic compounds have high melting and boiling points?

• Their ions are free to move.

• Their ions are held in fixed positions.

• They have many strong bonds which require a large amount of heat energy to overcome these strong bonds.

• They have weak bonds which require a little amount of heat energy to overcome these weak bonds.

Tags

NGSS.HS-PS1-3

NGSS.HS-PS1-4

Which three of the following are features of ionic compounds? (click 3 boxes)

• They have bonds between metals and non-metals.

• They have bonds between two non-metals.

• They form simple molecular structures.

• They form giant ionic lattices.

• They involve the transfer of electrons.

Tags

NGSS.MS-PS1-1

Be and F can combine to form BeF₂, an ionic compound. Select ALL the true statements.

• Each Be atom loses two electrons from the outer shell.

• Each F atom gains two electrons from Be.

• The force holding the ionic compound together is electrostatic attraction.

• Each F ion has a charge of -1

Select all the true statements:

• Each outer shell electron in Cl is represented by a cross.

• In Na, the total charge is -2.

• Na+ and Cl- are held together by electrostatic attraction.

• Na+ has a full outer shell of electrons.

Tags

NGSS.MS-PS1-1

Match the following to form true statements:

• can conduct electricity

• Ionic compounds have

• high melting and high boiling points

• When melted ionic compounds

• with a charge of 1+

• When solid, ionic compounds

• cannot conduct electricity

• Elements in group 1 of the periodic table form ions

• between ions in an ionic compound.

• There are many strong bonds

Sodium Oxide is Na₂O. Meaning there are 2 Na present for every O in the ionic compound. As the Oxygen ion has a charge of -2, what charge does each Sodium ion have?

• -1

• -2

• +2

• +1