Group 17 is called the halogen family, and the group to its right is called the noble gases. how are these elements alike and how are they different?

-The group 7 elements are also known as the halogens. They include fluorine, chlorine, bromine and iodine, which all have seven electrons in their outer shell.

-The noble gases make a group of chemical elements with comparable 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, neon, argon, krypton, xenon, and the radioactive radon. FACT: They can also act like a glow stick.[ID1] 

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a lot of it means it can be "burned" for energy and sold at one price. if it is scarce, the price will go up