a) HClO,
b) HClO ,
c) HClO ,
d) HClO .
2
3
4
23. Using electronegativity as a guide, which formula is correctly written
a) F S,
b) Cl O,
c) Br C,
d) I P
6
2
4
3
24. The correct name for the compound NaClO is sodium
3
a) Chloride,
b) Chloric,
c) Chlorate,
d) Chlorite
25. Which electron configuration represents the atom in the period 2 with the lowest
ionization energy
a) 1s22s1,
b) 1s12s2,
c) 1s22s22p1, d) 1s22s22p2
26. In general, the element with the lowest ionization energy would be classified as
a) halogens,
b) noble gases, c) metals,
d) non-metals
27. A neutral oxygen atom (O) differs from an ion of oxygen (O2-) in that the atom
has,
a) more electrons,
b) fewer electrons, c) more protons, d) fewer protons
28. An element that has both a high ionization energy and high electronegativity is
most likely to be
a) metal,
b) nonmetal,
c) metalloid, d) noble gas.
29. The atoms of the most active non-metals have,
a) small atomic radius and high ionization energy,
b) small atomic radii and low ionization energy,
c) large atomic radii and low ionization energy,
d) large atomic radii and high ionization energy
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30. As one proceeds from the left to right in period 3, of the periodic table, there is
a decrease in
a) ionization energy,
b) electronegativity,
c) metallic character,
d) valence electrons.
31. As one proceeds from right to left across period 3 of the periodic table, the
number of electrons in the 2p subshell,
a) decrease,
b) increase,
c) remain the same,
d) increase then decrease
32. Which of the group 17 elements has the greatest nuclear charge,
a) F,
b) Cl,
c) Br,
d) I.
33. Which element will form a compound with the general formula M CO when it
2
3
combines with carbonate ions,
a) beryllium,
b) aluminum, c) calcium,
d) lithium.
34. As the elements are considered from top to bottom of the periodic table in group
15, the ionization energy
a) decreases,
b) increases,
c) remains the same,
d) increases then remains the same.
35. Considered in succession, the elements in period 2 of the table show decreased
atomic radius with increasing atomic numbers. This may best be explained by
the fact that the
a) nuclear charge increases,
b) number of principal energy levels increase,
c) number of neutrons decreases,
d) electronegativity decrease.
36. During the electrolysis of fused NaCl, which reaction occurs at the positive
electrode?,
a) Chloride ions are oxidized,
b) Chloride ions are reduced,
c) Sodium ions are oxidized,
d) sodium ions are reduced.
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37. Which group includes elements that are generally obtained from their compounds
by electrolysis,
a) Al, Mg, Na,
b) C, Ca, Na,
c) Cl, P, Na,
d) O, Al, Ar
38. The energy equivalent of the mass defect is called,
a) an alpha particle,
b) binding energy,
c) half-life,
d) kinetic energy.
39. Which can be used as a coolant in a nuclear reactor,
a) graphite,
b) sodium,
c) Carbon dioxide,
d) water
40. When neutrons and protons combine to form a stable nucleus, the actual mass
of the nucleus compared to the total mass of its parts is always,
a) less,
b) greater,
c) the same,
d) sometimes greater sometimes less.
Answer Key
1. c,
13. a,
25. a,
37. a,
2. b,
14. d,
26.c,
38. b,
3. c,
15. c,
27. b,
9. b,
4. c,
16. b,