Understanding Ionic Bonds and Dot and Cross Diagrams

What is the main purpose of a dot and cross diagram?

• To illustrate the transfer of electrons

• To show the movement of protons

• To display the atomic mass

• To calculate the number of neutrons

What happens to a sodium atom when it forms an ion?

• It gains two electrons

• It loses one electron

• It gains one proton

• It loses two protons

Why do atoms form ions?

• To change their element type

• To decrease their atomic mass

• To achieve a full outer electron shell

• To increase their atomic number

What charge does a chloride ion have?

• 1 minus

• 2 plus

• 2 minus

• 1 plus

What type of force holds ionic compounds together?

• Nuclear force

• Magnetic force

• Gravitational force

• Electrostatic force

In a dot and cross diagram, how are electrons from different atoms represented?

• As dots and crosses

• As lines and arrows

• As circles and squares

• As triangles and stars

What is the charge of a magnesium ion in MgCl2?

• 1 plus

• 2 plus

• 1 minus

• 2 minus

How many chloride ions are needed to balance one magnesium ion in MgCl2?

• One

• Two

• Three

• Four

What is the general rule for electron movement in ionic bonding?

• Electrons move from solids to gases

• Electrons move from gases to liquids

• Electrons move from metals to nonmetals

• Electrons move from nonmetals to metals

In a dot and cross diagram, what should be shown with an arrow?

• The movement of protons

• The movement of atoms

• The movement of neutrons

• The movement of electrons