Basics ‹ 63
- Which of the following elements has the lowest
electronegativity?
(A) C
(B) K
(C) Al
(D) I - Choose the ion with the largest ionic radius.
(A) F-
(B) Al^3 +
(C) K+
(D) I-- What is the name of the energy change when a
gaseous atom, in the ground state, adds an elec-
tron?
(A) ionization energy
(B) sublimation energy
(C) atomization energy
(D) electron affinity - The following ionization energies are reported
for element X. (All the values are in kJ/mol.)
FIRST SECOND THIRD FOURTH FIFTH
500 4,560 6,910 9,540 13,400
Based on the above information, the most likely
identity of X is:
(A) Mg
(B) Cl
(C) Al
(D) Na
- In general, as the atomic number increases
within a period, the atomic radius:
(A) decreases
(B) increases
(C) first decreases and then increases
(D) does not change - Which of the following elements is a reactive
gas?
(A) chlorine
(B) gold
(C) sodium
(D) radon
12. Which of the following elements is an unreactive
metal?
(A) chlorine
(B) gold
(C) sodium
(D) radon
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 [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
15. Which of the following compounds is the most
likely to be ionic?
(A) CH 4
(B) SiO 2
(C) Cs 2 S
(D) XeF 2
16. If the name of a binary compound, a compound
containing only two elements, contains a multi-
plying prefix, such as di- or tri-, then the com-
pound is most likely:
(A) ionic
(B) molecular
(C) metallic
(D) unstable
17. What is the symbol for the element that forms a
protective oxide coating?
(A) K
(B) Ga
(C) Al
(D) Mg