(i) CH2=CH-CH2-CH=CH2
(CHEMISTRY)
Give IUPAC name of the compound.

1. three hundred fifty texans massacred goliad 2. the president who annexed texas tyler 3. a mission used as a fort san jacinto 4. dictator of mexico sam houston 5. texas william travis 6. commander of the texas army lone star republic 7. where santa anna was captured stephen austin 8. brought more than two thousand people to texas alamo 9. texan commander of the alamo santa anna

Which sentence best represents the thesis of this article? a they challenge us to consider whether we can trust what we are seeing. b optical illusions may seem mysterious, but they are not unexplainable. c through science, we can learn how optical illusions work. d let’s take a look at three common optical illusions and explore the science behind each one.

There are 25 elements found in living things. how many of these elements are found in some organisms but not all? 1 , 6 , 19 , 25