When does the end of a name of a negative ion end in -ide

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

hope this : )

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.