A) Noble gases are called "noble" because they are chemically inert or unreactive under normal conditions. This unreactivity stems from their stable electron configurations, as they possess a fu

Here is the solution to Q4.

Q4.

a) Noble gases are called "noble" because they are chemically inert or unreactive under normal conditions. This unreactivity stems from their stable electron configurations, as they possess a full outer electron shell, making them disinclined to gain, lose, or share electrons with other atoms to form chemical bonds.

b) Five general characteristics of noble gases are:

• They are chemically inert or unreactive.
• They exist as monatomic gases at room temperature.
• They have a full valence electron shell (octet rule, or duet for helium), making them very stable.
• They are colorless, odorless, and tasteless.