Understanding Lewis Structures and Covalent Bonding

What do the dots around the symbol in a Lewis Structure represent?

• Neutrons in the nucleus

• Protons in the nucleus

• Valence shell electrons

• Nucleus of the atom

How many valence electrons does aluminum have in its Lewis Structure?

• Three

• Two

• Four

• One

What is the significance of the octet rule in covalent bonding?

• It ensures atoms have eight protons.

• It ensures atoms have eight neutrons.

• It ensures atoms have eight valence electrons.

• It ensures atoms have eight electrons in total.

Why do hydrogen and chlorine form a covalent bond?

• To become negatively charged

• To become positively charged

• To increase their atomic mass

• To achieve a full outer shell of electrons

Why is chlorine more stable as Cl2 rather than as a single atom?

• It has a higher atomic mass.

• It has fewer electrons.

• It has more protons.

• It has a full outer shell of electrons.

What type of bond is formed between two oxygen atoms in O2?

• Single bond

• Triple bond

• Ionic bond

• Double bond

How many electrons are shared in a double bond?

• Eight

• Four

• Two

• Six

What type of bond is present in carbon monoxide?

• Ionic bond

• Double bond

• Single bond

• Triple bond

Why is nitrogen gas (N2) considered stable?

• It has an ionic bond.

• It has a double bond.

• It has a single bond.

• It has a triple bond.

What additional electron does the cyanide ion (CN-) have?

• An electron from a halogen

• An electron from a noble gas

• An electron from a metal

• An electron from a non-metal