Final answer:
Lead is a soft dense metal used in bullets and car batteries. It was once used in plumbing and paint, but has been banned due to concerns over its biological effects. It has also been phased out as a gasoline additive for the same reason.
Step-by-step explanation:
Lead is a soft dense metal that is commonly used in bullets and car batteries. It was once used in plumbing and paint, but due to concerns over its biological effects, it has been banned for these purposes. Additionally, it has been phased out as a gasoline additive for the same reason.