Final answer:
The incorrect statement is D, suggesting that one in two U.S. children under six years of age has a blood lead level above 15 g/mL. The acceptable levels are much lower according to the CDC, with 5 μg/dL for children and 10 μg/dL for adults.
Step-by-step explanation:
The statement that is not correct is: D: The EPA estimates that one in two U.S. children under six years of age has a blood lead level above the acceptable level of 15 g/mL. This statement is inaccurate as the Centers for Disease Control (CDC) has set the upper limit for blood lead levels much lower. For adults, the acceptable level is at 10 μg/dL (10 micrograms per deciliter), while for children it is even lower at 5 μg/dL. Moreover, even these levels are not considered 'safe' but are thresholds where action is taken to reduce lead exposure. Lead poisoning is a serious health issue affecting both children and adults but is particularly harmful to young children because of their developing nervous systems and tendency to absorb more lead than adults.
Lead has been used throughout history for its various properties, including its abundance and malleability, as mentioned in statement A. The Latin name for lead, plumbum, is indeed the origin of its chemical symbol Pb, as mentioned in statement B. As for statement C, lead ingestion is known to cause severe and permanent neurological problems, making this statement correct.