Target: 10 Questions in 10 minutes

An IB Chemistry data booklet is helpful
1. Which property will show a general decrease across the Periodic Table from Li to F?
  • A.   atomic radius
  • B.   electron affinity
  • C.   ionization energy
  • D.   electronegativity
2. Which set of ions is listed in order of increasing ionic radius?
  • A.   Cl- < S2- < Ca2+ < K+
  • B.   S2- < Cl- < K+ < Ca2+
  • C.   K+ < Ca2+ < S2- < Cl-
  • D.   Ca2+ < K+< Cl- < S2-
3. Which equation represents the electron affinity of calcium?
  • A.   Ca(g)  +  e- → Ca-(g)
  • B.   Ca(s)  +  e- → Ca-(s)
  • C.   Ca(g) → Ca+(g)  +  e- 
  • D.   Ca(s) → Ca+(s)  +  e- 
4. The ionic radius of Mg2+ is less than that of F-. Which statement helps to explain this fact?
  • A.   Magnesium is in period 3 but fluorine is in period 2
  • B.   Mg2+ has more electrons than F-
  • C.   Magnesium is a metal and fluorine is a non-metal
  • D.   Mg2+ has more protons that F-

5. Which of the following properties will generally decrease with increasing atomic number for both Alkali Metals and Halogens?

I. Electronegativity
II. Ionic radius
III. First electron affinity
 
  • A.   I and II only
  • B.   II and III only
  • C.   I and III only
  • D.   I, II and III
6. Which of the following are listed in the order of more exothermic first electron affinity?
  • A.  Cl, Br
  • B.  F, Na
  • C.  F, Cl
  • D.  Li, Na
7. Which statement is correct?
  • A.   The ionic radius of sodium is greater than its atomic radius
  • B.   The electron affinity of fluorine is greater than that of oxygen
  • C.   The outer electrons in chlorine are more shielded from the nucleus than those in bromine
  • D.   The ionization energy of potassium is greater than that of lithium
8. Which reason best explains why the magnesium ion is MUCH smaller than the magnesium atom?
  • A.   The magnesium ion has one electron shell less than the atom
  • B.   Both entities have 12 protons in the nucleus
  • C.   The magnesium atom has two electrons more than the ion
  • D.   Magnesium is a metal so forms positive ions
9. Which statement about electronegativity is NOT correct?
  • A.   Sodium has a greater electronegativity value than caesium
  • B.   Metals generally have lower electronegativity values than non-metals
  • C.   Fluorine has a greater electronegativity value than lithium
  • D.   Argon has the highest electronegativity value in period 3

10.Which row correctly states and explains the trend in the ionization energy from Be to Ba?

  Trend Because …
A increases the valence electrons are further from the nucleus in Ba
B increases Ba has a greater nuclear charge
C decreases the valence electrons are further from the nucleus in Ba
D decreases Ba has a greater nuclear charge