A copper wire is left outside on the ground for several weeks. Which statement describes a change resulting from the chemical properties of the
wire?
A. It conducts electricity when lightning strikes it.
B. It melts when heated.
C. It becomes tarnished.
D. It bends when someone steps on it.

Mrs. smith ordered a root beer float (vanilla ice cream + root beer). mrs. smith noticed that the three states of matter (solid, liquid, and gas) all existed simultaneously in her root beer float. a. identify each phase of matter in the root beer float. b. describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? ) c. identify one phase change you would see in a root beer float and described what causes this change.

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

Who examines and coordinates the cleanup of polluted sites?