The following equations represent part of a radioactive decay series: 1. 92238u → a + 24he 2. a → 91234pa + b 3. 91234pa → c + –10e 4. c → 90230th + 24he 5. 90230th → d + 24he 6. d → 86222rn + e 7. 86222rn → 84218po + f 8. 84218po → g + 24he 9. g → 83214bi + h 10. 83214bi → i + –10e 11. i → j + 24he

Why is soap used to remove grease? a. its nonpolar end dissolves the grease. b. it makes the water bond with the grease. c. it chemically bonds with the grease. d. its polar end dissolves the grease.correct answer for apex - a, its nonpolar end dissolves the grease.

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange