1. based on the information from the movie, what can you conclude about the most common chemical compound on earth?

a. it's oxygen
b. it's hydrogen gas
c. it's carbon dioxide
d. it's water

2. what is true of a compound?

a. it does not always retain the properties of the substances that make it up
b. it must have water as one of its components
c. it requires heat energy to make
d. it requires electrical energy to make

1.   d. It's water

2.  a. It does not always retain the properties of the substances that make it up

Explanation:

alfred von schlieffen, german army chief of staff, was given instructions to devise a strategy that would be able to counter a joint attack. in december, 1905, he began circulating what later became known as the schlieffen plan. schlieffen argued that if war took place it was vital that france was speedily defeated.

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