Understanding the Octet Rule and Its Limitations

What is the primary reason noble gases like neon and argon are stable?

• They have a full outer shell of eight electrons.

• They can form multiple bonds easily.

• They have a low atomic mass.

• They have a high atomic number.

How does sodium achieve stability according to the octet rule?

• By forming a covalent bond with chlorine.

• By sharing electrons with another sodium atom.

• By losing one electron.

• By gaining one electron.

What is the octet rule?

• The tendency of an atom to have eight electrons in its outermost shell.

• The ability of an atom to form eight bonds.

• The rule that atoms must have eight protons.

• The requirement for atoms to have eight neutrons.

Why is boron trifluoride considered a limitation of the octet rule?

• Boron has more than eight electrons.

• Boron forms a double bond with chlorine.

• Boron has a lone pair of electrons.

• Boron is stable with only six electrons.

What is a characteristic of hypervalent species?

• They cannot form stable compounds.

• They have more than eight electrons in their outer shell.

• They have exactly eight electrons in their outer shell.

• They have less than eight electrons in their outer shell.

Which molecule is an example of a hypervalent species?

• Boron trifluoride

• Phosphorus pentachloride

• Nitric oxide

• Sodium chloride

What is unique about noble gas compounds like xenon fluorides?

• They do not form bonds.

• They have expanded octets.

• They are unstable.

• They have an odd number of electrons.

Why is nitric oxide considered an odd electron species?

• It has an even number of electrons.

• It has an odd number of electrons.

• It forms a double bond with oxygen.

• It is a noble gas compound.

Which of the following is NOT a limitation of the octet rule?

• Noble gas compounds

• Hypervalent species

• Hypovalent species

• Atoms with exactly eight electrons

What is a common feature of odd electron species?

• They are noble gases.

• They are always unstable.

• They have an odd number of electrons.

• They have a complete octet.