If there were 400g of U238 in a sample, how many grams would be left in 18 billion years
1-200
2-100
3-50
4-25

Which term describes a fracture in the earth at which land stays in the same place? a. joint b. fault c. split d. hinge

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.