Neon argon and krypton are in the same column on the

Neon, argon, and krypton are in the same
column on the Periodic Table of the Elements.
•
What characteristic do these elements have in
common?
•
A. atomic mass
•
B. negative electrical charge
•
C. number of neutrons
•
D. full valence electron shells
•
Answer is D

Which characteristic is common to most
metals?

Traveling in opposite directions, buses A and B are passing
each other at the relative speed of 15 km/h, while Andres on
bus A walks toward the back of the bus at the speed of 5 km/h.
What is the velocity of the Andres on bus A relative to bus B?
A

A train travels around a track at 100 miles per
hour, four observers describe the motion of
the same train.
• Observer’s Descriptions
•
1 Train is moving to the right at 100mph
• 2 Train is moving to the left at 100mph
•
3 Train is moving away from him at 100mph
•
4 Train is moving towards him at 100mph
•
What reason best explains the differences in observers’
descriptions?

Student 1 rides in a moving car and observes a bus traveling
east. She estimates that it is traveling at a rate of 20 kilometers
per hour (km/h). Student 2 is standing on the sidewalk and
observes the same bus at the same time. She estimates that it is
moving east at a rate of 50 km/h.
• Which best explain this difference?
• A. velocity varies with the compass direction of motion
• B. measurement error causes multiple observations of motion to conflict
• C. all motion is relative to the frame of reference chosen for
measurement
• D. acceleration and velocity have different values because they are
different measure of motion.
• Answer: C

Certain elements with similar chemical and physical
properties are found in the same column in the
Periodic Table of the Elements. These chemicals