Potassium- 40 can also be used to date biological fossils since potassium is found living organisms. Potassium-40 has a half- life of 1.28 billion years. Potassium-40 decays to the daughter isotope argon-40. There is 20% of the original potassium-40 remaining. How old is the sample? What type of fossil might this be?

Which of the following are good traits of a hypothesis? it will be able to be testedit can predict an outcomeit will explain the observationsall of these

Which of the following is true about a carbonated soft drink? . the carbon dioxide is the solvent, and water is the solute.. the water is the solution, and carbon dioxide is the solvent.. the carbon dioxide is the solution, and the water is the solvent.. the water is the solvent, and the carbon dioxide is the solute.. .

If a straight-chain hydrocarbon is a gas at room temperature, how many carbon atoms will it have? a. 6 carbon atoms b. 12 carbon atoms c. 24 carbon atoms d. 3 carbon atoms