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The age provided for rock A is actually the age of what?

This family (molecules 1, 2, 3, etc) of materials is likely to have what set of properties?

Which of these statements best describes the energy transformations that take place in a car’s gasoline engine?

Semiconductors can behave like metals when you heat them up. Which of the following best explains how and why that happens?

Rock layers N and J occur on either side of the unconformity labeled I. What can you conclude from the cross section about the relative ages of layers N and J?

Which of these best describes the characteristics of the material formed?

What type of bond would exist between the nitrogen and the element from column 7A?

How many valence electrons would element 120 have?

Nitrogen, an element at the top of column 5A will react with any element from column 7A on the periodic table to form a molecular material. The next five questions ask you to make some predictions about the characteristics and behavior of the reactants and products of this reaction.

Scientists are trying to fabricate heavy elements through fusion. One element that they have not yet been able to make would have an atomic number of 120 and would be positioned in column 2A on the periodic table directly below Ra. Based on observed patterns, scientists have already predicted how this element might behave. In the next three questions, you are asked to use your understanding of chemistry to make some predictions of your own.