Chapter 16, Problem 6STP

To determine

To Choose:The correct option.

Answer to Problem 6STP

C. Neon

Explanation of Solution

Introduction:

Noble gases in the periodic table are more stable because they are having maximum number of valence electrons in their outer shells. Helium (He), Neon (Ne), etc., are noble gases.

Neon is a noble element in the periodic table that is arranged in group 18. Noble gases are unreactive with other elements because they already stable as they have full valence shell.

In the given table, the elements except for neon (Ne) do not belong to group 18 or they are not noble gases.

Also, according to data given in the table, electrons in the outer energy level of the Neon has 8 electrons and it is complete.

Conclusion: 

The neon (Ne) noble gas has a complete outermost energy level (8 electrons).