Ionic Bonds and Electron Transfer

The video tutorial explains how to write the Lewis structure for calcium fluoride (CaF2). It begins by introducing the concept of ionic compounds, where valence electrons are transferred from metals to non-metals. Calcium, with two valence electrons, transfers one electron to each fluorine atom, completing their octets and forming an ionic bond. The tutorial discusses the resulting charges and the neutrality of the compound. It also explains the use of brackets to indicate electron transfer and concludes with a summary by Dr. B.

What type of compound is formed when a metal and a non-metal combine?

• Covalent compound

• Ionic compound

• Metallic compound

• Molecular compound

How many valence electrons does calcium have?

• 2

• 8

• 1

• 7

In which group of the periodic table is fluorine found?

• Group 18

• Group 17

• Group 2

• Group 1

What happens to the electrons of calcium in the formation of CaF2?

• They are shared with fluorine

• They are transferred to fluorine

• They remain with calcium

• They are lost to the environment

What is the significance of completing the octet in fluorine during the formation of CaF2?

• It makes fluorine unstable

• It stabilizes fluorine

• It increases fluorine's reactivity

• It has no effect on fluorine

What charge does calcium have after losing electrons?

• 1+

• 1-

• 2+

• 2-

What is the overall charge of the compound CaF2?

• Variable

• Positive

• Negative

• Neutral

Why are brackets used around ions in the Lewis structure of ionic compounds?

• To show electron transfer

• To highlight the metal

• To indicate shared electrons

• To denote covalent bonds

What distinguishes ionic bonds from covalent bonds?

• Ionic bonds involve electron sharing

• Ionic bonds involve electron transfer

• Covalent bonds involve electron transfer

• Covalent bonds involve no electron movement

What is the role of oppositely charged ions in ionic bonding?

• They attract each other

• They repel each other

• They neutralize each other

• They do not interact