1)Find a room that can be made completely dark. In the room, tape a piece of white paper on the wall at eye level. Turn on the flashlight, and turn off the lights in the room. Observe what the light looks like as it hits the white paper. Next, place the clear plastic in front of the flashlight. Does the plastic affect how the light hits the paper on the wall? If so, how?
2)Now place the waxed paper in front of the flashlight instead of the plastic. Does the waxed paper affect how the light hits the paper on the wall? Explain your response.
In parts A and B, what happens to the light that doesn’t pass through either the plastic or the waxed paper? What is similar and different about the behavior of light in these two cases?

away from the curb

explanation:

the wheels would then hit the curb if it started to rolling, decreasing the chance of an accident.

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

"the periodic table is arranged in order of atomic number."