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Periodic Trends: Z Effective

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Wize University Chemistry Textbook > Periodic Table Trends

Summary of Periodic Table Trends

5 Activities

Wize University Chemistry Textbook > Periodic Table Trends

Effective Nuclear Charge (Zeff)

3 Activities

Which of the following periodic properties increases with the increase in effective nuclear charge across a period?

i. Ionization energy
ii. Electron affinity
iii. Atomic size


A. i only
B. ii only
C. iii only
D. ii and iii only
E. i and ii only
More Summary of Periodic Table Trends Questions:
Practice: Periodic Trends
1. Arrange the following elements in order of decreasing metallic character: Sr, N, Si, P, Ga, Al
2. Compare the 3rd IE of Ca, Sr and Y.
3. Na+ has ionic radius 102 pm and Li has atomic radius 182 pm. Explain.
Periodic Trends
Which of the following statements is correct about chlorine and phosphorus atoms?
A. The electron affinity of a chlorine atom is smaller than that of a phosphorus atom due to its smaller radius.
B. A chloride anion has higher electron affinity than a neutral chlorine atom.
Periodic Trends
Which statement about periodic properties is always true?
A. Electronegativity is defined as the desire an atom has for an electron.
B. High Electron affinity corresponds to a small exothermic electron attachment enthalpy.
Periodic Trends: Electronegativity
Choose the true statement:
Periodic Trends: Practice
Which of the choices below correctly identifies the relative size, electron affinity, and ionization energy of ground-state Cs, H, and N atoms?
More Effective Nuclear Charge (Zeff) Questions:
Overall concept testing
Choose the incorrect statement:
The Zeff for Cl is:
Atomic Radius
Calculate the effective nuclear charge (Zeff) for the following atoms.
Periodic Trends: Effective Nuclear Charge
What is the effective nuclear charge of Tellurium?
Periodic Trends: Effective Nuclear Charge
Calculate the approximate effective nuclear charge of Se.
"The Periodic Table", image retrieved from Chemistry 2e (https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/Chemistry2e-OP_QCzV58S.pdf) by Flowers, P et al., is licensed under CC BY.
Periodic Trends: Effective Nuclear Charge
What is the approximate effective nuclear charge for Al?
"The Periodic Table", image retrieved from Chemistry 2e (https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/Chemistry2e-OP_QCzV58S.pdf) by Flowers, P et al., is licensed under CC BY.
Periodic Trends: Z Effective
What is the Zeff on an electron in the valence shell of Mg?
Periodic Trends: Effective nuclear charge
What is the most likely value for the Zeff of an electron in the valence shell of Mg?
Atom: Atomic Properties
Students in a previous year were asked a certain set of questions. For each of the questions and the given responses, in the corresponding boxes, identify whether the student response is correct or incorrect and the corrections that need to be made.
a) Question: IE for O = 1310 kJ/mol and IE for Cl = 1250 kJ/mol. Explain why this difference exists.
Student’s response: Because Cl has a higher n-value the electrons are further from the nucleus, giving the atom more room and the ability to add additional electron(s).
Periodic Trends: Practice
Complete the statements below by filling in the blanks and then choose which option below would help explain your answer.
Periodic Trend: Z effective
The Zeff for Cl is: