IA Problem 2.2 Part A For the Kanji character in the lower portion of the How wi

Question

IA Problem 2.2 Part A For the Kanji character in the lower portion of the How wide is the character in terms of iron atoms? The character is 12 iron atoms wide. The character is 24 iron atoms wide. The character is 10 iron atoms wide. The character is 2 iron atoms wide. - Submit My Answers Give Up Correct Part B Given the radius of an iron atom is 126 pm, calculate the width of this character in centimeters. Express your answer with the appropriate units ValueUnits Answers Ghve Lip Submit Continue 21

Explanation / Answer

Ans. Given, Width of the character = 12 Fe-atoms         

Radius of one Fe-atom = 126 pm

= 126 x 10-12 m                                             ; []1 pm = 10-12 m]

= 126 x 10-9 cm

= 1.26 x 10-7 cm

Now,

Diameter of Fe-atom = 2 x Radius = 2 x 1.26 x 10-7 cm = 2.52 x 10-7 cm

# The atoms lie end to end in chains. So, the total width of the character is equal to the sum of diameter of the constituting atoms.

Total width of the character = Number of Fe-atoms x Diameter of one Fe-atom

                                    = 12 Fe-atom x (2.52 x 10-7 cm / Fe-atom)

                                    = 3.024 x 10-6 cm

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