Periodic Trend: Effective Nuclear Charge Video Lessons

Concept: Periodic Trend: Effective Nuclear Charge

Problem: Detailed calculations show that the value of Zeff  for the outermost electrons in Si and Cl atoms is 4.29+ and 6.12+ , respectively.What value do you estimate for Zeff experienced by the outermost electron in both Si and Cl, assuming that core electrons contribute 1.00 and valence electrons contribute 0.00 to the screening constant?

FREE Expert Solution
• Effective nuclear charge (Zeff) can be calculated by getting the difference of actual nuclear charge (Z) and screening effect (δ) caused by electrons between nucleus and valence electrons.

Z* = Z - δ

• The actual nuclear charge is also the atomic number of the element (no. of protons)

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Problem Details

Detailed calculations show that the value of Zeff  for the outermost electrons in Si and Cl atoms is 4.29+ and 6.12+ , respectively.

What value do you estimate for Zeff experienced by the outermost electron in both Si and Cl, assuming that core electrons contribute 1.00 and valence electrons contribute 0.00 to the screening constant?

What scientific concept do you need to know in order to solve this problem?

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Based on our data, we think this problem is relevant for Professor Hopkins' class at LSU.