- Which of the following groups has the species
correctly listed in order of increasing radius?
(A) Mg^2 +, Ca^2 +, Ba^2 +
(B) K+, Na+, Li+
(C) Br−, Cl−, F−
(D) Na, Mg, Al
(E) Fe, Fe^2 +, Fe^3 +
- Which of the following elements has the lowest
electronegativity?
(A) C
(B) K
(C) Al
(D) I
(E) F
- Choose the ion with the largest ionic radius.
(A) F−
(B) Al^3 +
(C) K+
(D) O^2 −
(E) I−
- What is the name of the energy change when
a gaseous atom, in the ground state, adds an
electron?
(A) ionization energy
(B) sublimation energy
(C) atomization energy
(D) electron affinity
(E) lattice energy
- The following ionization energies are reported
for element X. (All the values are in kJ/mol.)
First Second Third Fourth Fifth
500 4560 6910 9540 13400
Based on the above information, the most likely
identity of X is
(A) Mg
(B) Cl
(C) Al
(D) Na
(E) Si
10. In general, as the atomic numbers increase
within a period, the atomic radius
(A) first increases and then decreases
(B) increases
(C) first decreases and then increases
(D) does not change
(E) decreases
Choose one of the following elements for ques-
tions 11 and 12.
(A) chlorine
(B) gold
(C) sodium
(D) radon
(E) radium
11. This element is a reactive gas.
12. This element is an unreactive metal.
13. Which of the following represents the correct
formula for potassium trisoxalatoferrate(III)?
(A) P 3 [Fe(C 2 O 4 ) 3 ]
(B) K 3 [Fe(C 2 O 4 ) 3 ]
(C) KFe 3 (C 2 O 4 ) 3
(D) K 3 FeO 3
(E) K 3 [Fe 3 (C 2 O 4 ) 3 ]
14. Which of the following substances will produce
a colorless aqueous solution?
(A) Zn(NO 3 ) 2
(B) CuSO 4
(C) K 2 Cr 2 O 7
(D) Co(NO 3 ) 2
(E) NiSO 4
15. This element is a liquid at room temperature.
(A) Hg
(B) Th
(C) Na
(D) Cl
(E) Co
Choose from the following elements for questions
16–18.
(A) K
(B) Ga
(C) Fe
(D) Mg
(E) Al
Basics 61
