Author Question: The vertical columns of the periodic table are referred to as a) periods. b) groups. c) ... (Read 39 times)

mpobi80 · **on:** Jul 28, 2018

The vertical columns of the periodic table are
referred to as
a) periods.
b) groups.
c) fullerenes.
d) lines.

Question 2

A 3.0-kg object moving 8.0 m/s in the positive x direction has a one-dimensional elastic collision with an object (mass = M) initially at rest. After the collision the object of unknown mass has a velocity of 6.0 m/s in the positive x direction. What is M?
a. 7.5 kg
b. 5.0 kg
c. 6.0 kg
d. 4.2 kg
e. 8.0 kg