Ionic and Covalent Bonding Concepts

The video explains the octet rule, which states that atoms bond to achieve a full valence shell of eight electrons, similar to noble gases. It covers two types of bonding: covalent (electron sharing) and ionic (electron transfer). The video also discusses exceptions to the octet rule, such as hydrogen, helium, and certain elements that can have expanded octets.

What is the main goal of atoms when they bond according to the octet rule?

• To lose all their electrons

• To become positively charged

• To form compounds with noble gases

• To achieve a full valence shell with eight electrons

Which of the following is an example of covalent bonding?

• Calcium carbonate

• Magnesium oxide

• Methane (CH4)

• Sodium chloride

In a molecule of bromine, how many electrons are shared in the covalent bond?

• Three

• Four

• Two

• One

What type of bond is formed when electrons are transferred from one atom to another?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Metallic bond

Which noble gas configuration does a sodium ion achieve after forming an ionic bond?

• Krypton

• Argon

• Neon

• Helium

Which element is stable with only two electrons in its valence shell?

• Boron

• Helium

• Sulfur

• Phosphorus

What is the electron configuration of boron in boron trifluoride (BF3)?

• Eight electrons

• Two electrons

• Four electrons

• Six electrons

Which of the following elements can have an expanded octet?

• Helium

• Beryllium

• Sulfur

• Hydrogen

What is the maximum number of electrons that can be held in the valence shell of period three elements like sulfur?

• Eight

• Fourteen

• Ten

• Twelve

Which of the following is NOT an exception to the octet rule?

• Boron

• Neon

• Helium

• Hydrogen