Nalie ME3311-005 (Material Sti Problem 1 20 points). Write the electron configur
ID: 697474 • Letter: N
Question
Nalie ME3311-005 (Material Sti Problem 1 20 points). Write the electron configuration of the following ions by u notation: Cr, Cr, Cr6 Problem 2 (15 points). Determine the Miller indices of the cubic crystal plane that intersects the following position coordinates: (1 )-G; (10) Calculate the time necessary to increase the carbon content to 0.35 wt % at 0.40 1.15 wt % and Problem 3 (15 points). Consider the gas carburizing of a gear of 1018 steel ( 927°C (1700° mm below the surface of the gear. Assume the carbon content at the surface to be that the nominal carbon content of the steel gear before carburizing is 0.18 wt %. D Cin rron) F). at 927°C-= 1.28 x 10-11 m?/s. m 4 (10 points). Ten kilograms of an alloy of 65 percent of A and 35 percent of B is ed from liquid to 250 °C. From the Eutectic phase diagram, calculate the following: 350 300 250 0 2090 rc) 150 100 50 10 20 30 50 60 70 80 90100% 100%Explanation / Answer
Answer:
Cr [Ar] 3d54s1
Cr2+ [Ar] 3d4
Cr3+ [Ar] 3d3
Cr6+ [Ar] .
Ar configuration : 1s22s22p63s23p6
Cr : 1s22s22p63s23p6 3d54s1
Cr2+ : 1s22s22p63s23p63d4
Cr3+ :1s22s22p63s23p6 3d3
Cr6+ :1s22s22p63s23p6
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