1. Atomic Structure and Periodicity
Review

2. Consider atoms of the following elements
Consider atoms of the following elements. Assume that the atoms are in the ground state.
S Ca Ga Sb Br
The atom that contains exactly two unpaired electrons?
The atom that contains only one electron in the highest occupied energy sublevel?

3. 1s2 2s22p5 3s23p5
1s2 2s22p6 3s23p6
1s2 2s22p62d10 3s23p6
1s2 2s22p6 3s23p63d5
1s2 2s22p6 3s23p63d3 4s2
An impossible electronic configuration
The ground-state configuration for the atoms of a transition element
The ground-state configuration of a negative ion of a halogen
The ground-state configuration of a common ion of an alkaline earth element

4. Represents an atom that is chemically unreactive
1s ___2s ↑
1s ↓↑ 2s ↓↑
1s ↓↑ 2s ↓↑ 2p ↑ ↑
1s ↓↑ 2s ↓↑ 2p ↓↑ ↓↑ ↓↑
[Ar] 4s ↓↑ 3d ↓↑ ↑ ↑ ↑ ↑
Represents an atom that is chemically unreactive
Represents an atom in an excited state
Represents an atom that has four valence electrons

5. Forms monatomic ions with 2¯ charge in solutions
F S Mg Ar Mn
Forms monatomic ions with 2¯ charge in solutions
Forms a compound having the formula KXO4
Forms oxides that are common air pollutants and that yield acidic solution in water

6. What is the most electronegative element of the above?
O La Rb Mg N
What is the most electronegative element of the above?
Which element exhibits the greatest number of different oxidation states?
Which of the elements above has the smallest ionic radius for its most commonly found ion?

7. Activation energy Free energy Ionization energy Kinetic energy Lattice energy
The energy required to convert a ground-state atom in the gas phase to a gaseous positive ion
The energy change that occurs in the conversion of an ionic solid to widely separated gaseous ions

8. Which of the following represents a pair of isotopes?
Atomic Atomic Number Mass Number I II I II I II I II I II

9. 1s2 2s22p6 3s23p3 Atoms of an element, X, have the electronic configuration shown above. The compound most likely formed with magnesium, Mg, is…

10. What is the ground state electron configuration for the Mn3+ ion
What is the ground state electron configuration for the Mn3+ ion? (Atomicnumber Mn = 25)

11. Gaseous atoms of which of the elements above are paramagnetic?
Ca V Co Zn As
Gaseous atoms of which of the elements above are paramagnetic?

12. What is one possible set of four quantum numbers for one of the outermost electrons in a strontium atom in the ground state

13. What conclusion can be drawn from J. J
What conclusion can be drawn from J. J. Thomson's cathode ray experiments? What is a correct interpretation of the results of Rutherford's experiments in which gold atoms were bombarded with alpha particles?

14. Describe three species of atoms/ions that are isoelectronic What properties generally decreases across the periodic table from sodium to chlorine?

15. The effective nuclear charge experienced by the outermost electron of Na is different than the effective nuclear charge experienced by the outermost electron of Ne. This difference best accounts for…