Uranium-234 is used to make dental
crowns appear brighter. the alpha decay of ura-
nium-234 produces what isotope?

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.

What is a difference between a mixture of elements and a mixture of compounds