A student finds that an unknown element reacts with elements from Group 2 (IIA). To which group does the unknown element most likely belong? A.
Group 1 (IA)

B.
Group 3 (IIIB)

C.
Group 16 (VIA)

D.
Group 18 (VIIIA)

What is a scientific theory? a. a scientist's guess about how something works b. the results of an experiment obtained using the scientific method c. a proven fact that will never change d. an idea that is backed by data from many sources

How much energy moves onto the next level, in an energy pyramid

Identify a specific example for each type of technology