c. x-rays
My answer is that x-rays or gamma rays have the greatest (or highest) frequency waves.
Answer:
The noble gases (Group 18) are located in the right of the periodic table and were previously referred to as the "inert gases" due to the fact that their filled valence shells (octets) make them extremely nonreactivE
Explanation:
Sodium chloride because it contains the most reactive metal(sodium) and most reactive non-metal(chlorine).