A student investigates the motion of a toy vehicle. The student graphs 40 seconds of data from the investigation
Motion of a Toy Vehicle
15
10
Distance
(meters)
0
10 20
30 40 50
Time (seconds)
Which statement best describes the motion of the toy vehicle during the first 30 seconds of the
investigation?
The vehicle was traveling at a constant speed.
The vehicle was accelerating at a constant rate.
I
The speed of the vehicle was increasing.
The acceleration of the vehicle was increasing.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

answer; natural resources;