Which term refers to a gas that is not reactive because it is stable?

Which term refers to a gas that is not reactive because it is stable?

• A. Inert gas
• B. Igneous rock
• C. Herbicide
• D. Hydroponics

Answer: (A)

Gases that do not react because they are stable are described as inert gases. The reason is that their atoms have a full outer electron shell, giving them a very stable arrangement that doesn’t readily gain, lose, or share electrons to form bonds. These gases, also known as noble gases, include helium, neon, and argon, which explains why they’re so unreactive under normal conditions. The other terms don’t fit because igneous rock is a solid rock formed from cooling magma, a herbicide is a chemical used to kill weeds, and hydroponics is a method of growing plants in nutrient solution.

Gases that do not react because they are stable are described as inert gases. The reason is that their atoms have a full outer electron shell, giving them a very stable arrangement that doesn’t readily gain, lose, or share electrons to form bonds. These gases, also known as noble gases, include helium, neon, and argon, which explains why they’re so unreactive under normal conditions. The other terms don’t fit because igneous rock is a solid rock formed from cooling magma, a herbicide is a chemical used to kill weeds, and hydroponics is a method of growing plants in nutrient solution.