Homework #7

Last updated
Save as PDF

Page ID: 36917

\( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}} } \) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash {#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\)

Q1

(10 pts) Using the condensed \(spdf\) notation with noble-gas-core abbreviation, depict the electron configurations of the following ions and indicate if they are paramagnetic or diamagnetic.

\(Na^+\)
\(Mn^{2+}\)
\(Sb^{3+}\)
\(Sb^{5+}\)
\(O^{2-}\)

Q2

(10 pts) For each of the following pairs, indicate the atom that has the larger radius:

F or Br
Cs or Ba
Br or Br^-
P^3- or Cl^-
S^2- or Ca²⁺

Q3

(10 pts) Answer the following questions.

B has a lower (first) ionization energy than N. Explain the reason by using the word "effective nuclear charge".
Be has a higher ionization energy than B. Explain why.

Q4

(10 pts) Answer the following questions.

Which of the following orbitals is better at shielding? 5p or 5f
Which of the following can form an acidic oxide? Si or K
Which chemical species is a better oxidizing agent? F or I

Q5

(10 pts) Compare the elements He, Ne, Ar, and Kr. Place the elements in order of increasing melting point and explain why.

Q6

(10 pts) Arrange the following bonds in order of increasing ionic character:

H-Cl
C-H
H-F
F-Rb
F-F

Q7

(20 pts) Draw the plausible Lewis structure for each of the following species.

\(H_2S\)
\(C_2H_4\)
\(C_2H_2\)
\(OCN^-\)
\(Cl_2SO\)