Question

Why are the noble gases the least reactive elements?

They have the same number of electrons as protons
They are all radioactive
Their outer most energy levels are complete with 8 electrons
They are the last elements in each row on the periodic table

Answers

Answered by GPT 3.5
The correct statement is: Their outermost energy levels are complete with 8 electrons.

The noble gases, also known as Group 18 elements, have full valence electron shells consisting of 8 electrons except for helium, which has 2 electrons. This electron configuration makes them stable and unreactive because they have achieved a full octet, which is the most stable electron configuration. As a result, noble gases do not readily gain, lose, or share electrons to form compounds with other elements, making them highly unreactive.

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