Circle the atom in each pair that has the greater ionization energy. LI or Be-
Ca or Ba-
Na or K-
Por Ar-
CI or SI-

it means there are 3 atoms of oxygen

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 : )