Question

Q.6 Assertion (A): Noble gases are highly reactive
Reason (R): Noble gases have stable closed shell electronic configuration​

Answer 1

Answer:

A and R are both correct but R is not correct explanation of A.

Explanation:

In any given period, the noble gas element has highest ionization enthalpy. The valence shell of noble gases is completely filled. This closed shell electronic configuration is very stable. Large amount of energy is required to remove an electron from a completely filled outermost shell.

Answer 2

Assertion is false and reason is true.

Explanation:

• The noble gases are a group of chemical elements that make up Group 18 on the periodic table.

• These gases all have similar properties under standard conditions: they are all odorless, colorless, monatomic gases with very low chemical reactivity.

• The six noble gases that occur naturally are helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn).

• The outer shell of valence electrons is considered to be “full” in noble gases, giving them little tendency to participate in chemical reactions.

• Noble gases have the largest ionization potential among the elements of each period. This reflects the stability of their electron configuration and points again to their relative lack of chemical reactivity.