Question

Nitrogen (N), oxygen (O), chlorine (Cl), neon (Ne), and argon (Ar) are all elements that occur as a gas at room temperature (20°C). Using the periodic table, which pair of gases has the most similar properties?

Answer 1

neon and Argon both are noble gas, so they have same property !!

Answer 2

The gases that has the most similar properties is

Neon (Ne) and Argon (Ar)

Step-by-step explanation

From periodic table both Argon (Ar) and Neon(Ne) are element in group 18 which are referred to as noble gases.

Noble gases are inert since they have eight (8) valence electrons ( electrons in their outermost shell) which make them stable( neither gain or lose electrons)