Detailed calculations show that the value of Z e f f for the outermost electrons in Na and K atoms is 2.51 + and 3.49 +, respectively. (a) What value do you estimate for Z e f f experienced by the outermost electron in both Na and K by assuming core electrons contribute 1.00 and valence electrons contribute 0.00 to the screening constant? (b) What values do you estimate for Z e f f using Slater's rules? (c) Which approach gives a more accurate estimate of Z e f f ? (d) Does either method of approximation account for the gradual increase in Z i ff that occurs upon moving down a group? (e) Predict Z e f f for the outermost electrons in the Rb atom based on the calculations for Na and K.
Detailed calculations show that the value of Z e f f for the outermost electrons in Na and K atoms is 2.51 + and 3.49 +, respectively. (a) What value do you estimate for Z e f f experienced by the outermost electron in both Na and K by assuming core electrons contribute 1.00 and valence electrons contribute 0.00 to the screening constant? (b) What values do you estimate for Z e f f using Slater's rules? (c) Which approach gives a more accurate estimate of Z e f f ? (d) Does either method of approximation account for the gradual increase in Z i ff that occurs upon moving down a group? (e) Predict Z e f f for the outermost electrons in the Rb atom based on the calculations for Na and K.
Detailed calculations show that the value of Zeff for the outermost electrons in Na and K atoms is 2.51 + and 3.49 +, respectively. (a) What value do you estimate for Zeff experienced by the outermost electron in both Na and K by assuming core electrons contribute 1.00 and valence electrons contribute 0.00 to the screening constant? (b) What values do you estimate for Zeff using Slater's rules? (c) Which approach gives a more accurate estimate of Zeff? (d) Does either method of approximation account for the gradual increase in Ziff that occurs upon moving down a group? (e) Predict Zeff for the outermost electrons in the Rb atom based on the calculations for Na and K.
The table shows the tensile stress-strain values obtained for various
hypothetical metals. Based on this, indicate which is the most brittle
and which is the most tough (or most resistant).
Breaking strength Elastic modulus
Material Yield strength Tensile strength
Breaking strain
A
(MPa)
415
(MPa)
(MPa)
(GPa)
550
0.15
500
310
B
700
850
0.15
720
300
C
Non-effluence fracture
650
350
Please correct answer and don't used hand raiting
Materials. The following terms are synonyms: tension, effort and stress.
Chapter 7 Solutions
Chemistry: The Central Science Plus Mastering Chemistry with Pearson eText -- Access Card Package (14th Edition)
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.