What is the most reactive element in period 4

potassium

Explanation:

i know its very reactive, so much so it can't be found openly in nature, so i believe potassium is the most reactive in period 4

dec 23, 2016 - a load of bricks weighing 680 n a distance of 10 m across a parking lot. if if the worker pushes the cart with a constant force of 209 n, what work= force x distance = 220 n x 10 m = 2200 n.m = 2200 j i don't know where the person got it from, but the initial part, work= force x distance me.