In radioactive materials a parent atom decays into a daughter, such as uranium-238 decaying into lead-206. For some radioisotope dating methods you have to assume you know the amount of daughter atoms in the crystal, so you can tell how much is a result of radioactive decay (and thus get an age for the rock). Please answer this question: why are zircon crystals so useful for uranium/lead dating? If you don't remember from class, can you read this article.

What is the force of attraction between the particles in a salt crystal

Agood hypothesis includes which of the following? a: prediction b: data c: uncertainty d: conclusion

The diagram below shows a cell placed in a solution.a cell is shown placed inside a beaker. it is labeled cell. the solution inside the beaker is labeled 40% salt solution and the solution inside the cell is labeled 20% salt solution.only water is allowed to move in and out of the cell. what will most likely happen to the cell? it will expand as water moves out of it. it will shrink as water moves out of it.it will expand as water moves into it. it will shrink as water moves into it.