HELP PLS!!
Elements from which columns tend to lose their electrons?
a. 1st and 2nd
b. 13th and 14th
c. 15th and 16th
d. 17th and 18th

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.