Target: 10 Questions in 10 minutes

An IB Chemistry data booklet is helpful
1. Which is the best description of a metallic bond?

The electrostatic attraction between...

  • A.   positive and negative ions
  • B.   shared pairs of electrons and the positively charged nucleus
  • C.   positive ions and delocalized electrons.
  • D.   atoms and delocalized electrons
2. Which statement is true?
  • A.   Sodium has a stronger metallic bond than lithium
  • B.   Potassium has a weaker metallic bond than calcium
  • C.   The melting point of the alkali metals increases down the group
  • D.   The melting point of the metals Na, Mg, Al decreases with atomic number
3. Which has the higher melting point, sodium or aluminium and why?
  • A.   Aluminium because the aluminium ion has a greater charge density
  • B.   Aluminium because aluminium has a greater ionization energy
  • C.   Sodium because sodium has a smaller electronegativity
  • D.   Sodium because sodium has a larger atomic radius
4. Which statement explains why metals conduct electricity?
  • A.   Metals have delocalized electrons which are free to move
  • B.   Metals have layers of positive ions which can slide over each other
  • C.   Metals have lower ionization energies than non-metals in the same period
  • D.   Metals contain ions which are free to move

5. Sodium, graphite and sodium chloride can all conduct electricity. What particles conduct the current through the substance in each case?

  sodium graphite Sodium chloride
A ions electrons ions
B ions ions electrons
C electrons electrons electrons
D electrons electrons ions

6. A substance has a melting point of 1746°C. It does not conduct electricity when molten and is insoluble in water. What type of structure does the solid have?

  • A.   simple molecular
  • B.   giant ionic
  • C.   covalent network
  • D.   giant metallic

7. Which of the following combinations of characteristics gives metals a high melting point?

  • A.   A high charge on the metal ion and a large ionic radius
  • B.   A high charge on the metal ion and a small ionic radius
  • C.   A low charge on the metal ion and a large ionic radius
  • D.  A low charge on the metal ion and a small ionic radius

8. Which of the following is NOT a physical property for metals?

  • A.   Ductile
  • B.   Thermal conductor
  • C.   Malleable
  • D.  Electrical insulator

9 Which of the statements is correct for metals?

I. Metals are malleable because they contain weak bonds.
II. Metals can conduct heat due to freely moving electrons.
III. Metals are ductile because of the non-directionality of the metallic bonding.
 
  • A. I and II only
  • B. I and III only
  • C. II and III only
  • D. I, II and III
10. Which of the following metals has the lowest melting point?
  • A.   potassium
  • B.   magnesium
  • C.   aluminium
  • D.   sodium