What type of electron stays the same/constant as you move in the same direction across a period as increasing $Z_{eff}$? a) Valence electrons b) Core electrons
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Step 1: As we move across a period, the number of core electrons remains the same. Show more…
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Choose the correct statement: A. Effective nuclear charge, Zeff, decreases going across a period B. Core electrons have the lowest ionization energies of all electrons C. Effective nuclear charge, Zeff, increases going across a period D. Valence electrons are the most difficult of all electrons to remove
Raaz D.
Which of the following statements about the effective nuclear charge (Zeff) is correct? a. Zeff increases across a period and is relatively constant down a group. b. Zeff decreases across a period and increases down a group. c. Zeff increases with the size of the atom. d. Zeff increases as the value of the principal quantum number increases. e. Zeff is greater for hydrogen than for any other element.
Suman K.
Consider the change in effective nuclear charge experienced by a $2 p$ electron as we proceed from $C$ to $N$. (a) Based on a simple model in which core electrons screen the valence electrons completely and valence electrons do not screen other valence electrons, what do you predict for the change in $Z_{\text {eff }}$ from $C$ to $\mathrm{N}$ ? (b) What change do you predict using Slater's rules? (c) The actual change in $Z_{\text {eff }}$ from $C$ to $N$ is $0.70+.$ Which approach to estimating $Z_{\text {eff }}$ is more accurate? (d) The change in $\mathrm{Z}_{\text {eff }}$ from $\mathrm{N}$ to $\mathrm{O}$ is smaller than that from $\mathrm{C}$ to $\mathrm{N}$. Can you provide an explanation for this observation?
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