A little girl watches a carousel at the zoo. The horse passes her 12 times in
120 seconds. What is the frequency of the carousel? (Frequency is waves
or cycles per second) *
O
1 Hz
O
10 Hz
O
1 Hz
O
.01 Hz

Iron is a transition metal with multiple oxidation numbers. (answer the following) a. what is the iron (ii) ion? how does it differ from the iron (iii) ion? b. if iron were to bond with oxygen, predict the formula for each oxidation number of iron. c. how would each formula be named?