Question

Which of the following statements is not true for noble gases?

• A. They have stable configuration
• B. All of them contain eight electrons in their outermost shell.
• C. They are the zero group elements.
• D. They are colorless.

Answer 1

The correct option is B All of them contain eight electrons in their outermost shell.

Solution: Noble gases are the ones which have stable electronic configuration or which have fulfilled valence shell. But, this is not necessary that they have eight electrons in their valence or outermost shell. For example, Helium being a noble gas contains two electrons in its outermost shell.

Hence, the correct option is (B).