While looking at xenon (xe) on the periodic table, a student needs to find an element with a smaller atomic mass in the same group. where should the student look?
a) directly up
b) directly down
c) directly to the left
d) directly to the right

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.