List three halogens, and describe a property
that they all share.

The halogen group are fluorine, chlorine, bromine, iodine, and astatine. The halogenic elements all have seven valence electrons; they only require one electron to fill their outer shells, giving them an oxidation number of –1. Also, the halogens form diatomic molecules (e.g., Cl₂) in their elemental states.

Additionally, the halogens act like oxidizing agents, exhibiting the ability to oxidize metals. In fact, the name halogen is derived from the Greek meaning "salt former", referencing the fact that the halogens form salts when they react with metals.

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

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a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.