Dr. L. Dawe
Chemistry 1050
Winter 2011
February 14 and 15, 2011
Chapter 9
•
Section 9.1 (Page 361 – 364): Classifying the Elements: The Periodic Law
and the Periodic Table
–
Atomic number a basis for periodic law, main group and transition
elements. The long form of the periodic table.
•
Section 9.2 (Page 364 – 367): Metals and Nonmetals and Their Ions
–
Relationship between valence electron configuration and chemical and
physical properties of elements, Electron configurations of Noble gases,
main-group metal ions and nonmetal ions, transition metal ions.
•
Section 9.3 (Page 367 – 374): The Sizes of Atoms and Ions
–
Atomic radius, covalent radius, ionic radius, metallic radius, screening
and penetration, effective nuclear charge, the effects of penetration
and screening, variations of atomic radii within a group, within a period
and within a transition series of the periodic table. Ionic versus atomic
radius, relative sizes of isoelectronic species.
Dr. L. Dawe
Chemistry 1050
Winter 2011
The Sizes of Atoms and Ions
Which group has the elements listed in order of increasing atomic
radius?
1. Al, P, Cl, Ar
2. Rb, Sr, Ca, Mg
3. N, P, S, Se
4. Ne, Ar, Cl, Br
5. H, He, Ne, Ar
Dr. L. Dawe
Chemistry 1050
Winter 2011
The Sizes of Atoms and Ions
Which group has the elements listed in order of increasing atomic
radius?
1. Al > P > Cl > Ar
2. Rb > Sr > Ca > Mg
3. N < P > S < Se
4. Ne < Ar < Cl < Br
5. H > He < Ne < Ar
Dr. L. Dawe
Chemistry 1050
The Sizes of Atoms and Ions
Which of the following has the smallest radius?
1. Li+
2. Li
3. O24. Be2+
5. Ne
Winter 2011
Dr. L. Dawe
Chemistry 1050
Winter 2011
The Sizes of Atoms and Ions
For isoelectronic cations, the more positive the ionic charge, the smaller the ionic
radius.
Which of the following has the smallest radius?
1. Li+ – 59 pm
2. Li – 152 pm
3. O2- – 140 pm
4. Be2+ – 27 pm
5. Ne – 70 pm
Be2+ < Li+ < Ne < O2- ≈ Li
Dr. L. Dawe
Chemistry 1050
The Sizes of Atoms and Ions
Which of the following lists has the species increasing in radius?
1. Kr, Ar, Cl-, S22. Li+, Be2+, B3+
3. I-, Br-, Cl-, F4. F-, O2-, N3-, P35. Cl-, S2-, P3-, Al3+
Winter 2011
Dr. L. Dawe
Chemistry 1050
The Sizes of Atoms and Ions
Which of the following lists has the species increasing in radius?
1. Kr > Ar < Cl- < S22. Li+> Be2+> B3+
3. I- > Br- > Cl- > F4. F-< O2- < N3- < P35. Cl- < S2-< P3- > Al3+
Winter 2011
Dr. L. Dawe
Chemistry 1050
Winter 2011
Looking Ahead - February 17 and 24, 2011
Chapter 9
•
Section 9.4 (Page 374 – 378): Ionization Energy
–
•
Successive ionization energies, first ionization energy variation within a
group and a period as a function of atomic radius, exceptions to trend
in first ionization energy across a period.
Section 9.5 (Page 378 – 379): Electron Affinity
–
•
Exothermic and endothermic electron affinities (Groups 2 and 12 and
anions) in terms of attractions and repulsions for the added electron
Section 9.6 (Page 379 – 380): Magnetic Properties
–
•
Diamagnetic and paramagnetic species
Section 9.7 (Page 381 – 385): Periodic Properties of the Elements
–
Variation of atomic and physical properties across a period and within a
group.