12. (2.5) a. A hydrogen atom has a diameter of 5.3 x 10-¹¹ m. Express this diameter in nanometers and picometers. b. Placed side-by-side, how many hydrogen atoms would it take to equal a distance of 1 inch (1 in = 2.54 cm)? 13. (2.11) The elements carbon, calcium, chlorine, copper, and cobalt are present in the human body. Match each element to its correct atomic symbol: Co, Cu, Ca, C, Cl. 14. (2.17) In NAS dietary tables the dietary reference intakes for selenium is reported in micrograms per day, rather than the milligrams per day. For this element, convert the values into micrograms per day. a. The RDA for selenium is 0.055 mg/day. b. The UL for selenium is 40 mg/day.

12. (2.5) a. A hydrogen atom has a diameter of 5.3 x 10-¹¹ m. Express this diameter in nanometers and picometers. b. Placed side-by-side, how many hydrogen atoms would it take to equal a distance of 1 inch (1 in = 2.54 cm)? 13. (2.11) The elements carbon, calcium, chlorine, copper, and cobalt are present in the human body. Match each element to its correct atomic symbol: Co, Cu, Ca, C, Cl. 14. (2.17) In NAS dietary tables the dietary reference intakes for selenium is reported in micrograms per day, rather than the milligrams per day. For this element, convert the values into micrograms per day. a. The RDA for selenium is 0.055 mg/day. b. The UL for selenium is 40 mg/day.

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter2: Life, Chemistry, And Water

Section: Chapter Questions

Problem 1TYK: Which of the following statements about the mass number of an atom is incorrect? a. It has a unit...

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