Ionic and metallic bonding (Yr11)

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1. The animation on the right shows a salt crystal in water. Which one comment below is true?

A) The solution is capable of conducting a current because of the mobile ions present. B) The solution is incapable of conducting a current because the mobile ions are surrounded by water molecules. C) The crystal remaining in the water has a lower melting point than when it is out of the water. D) The solution is capable of conducting a current because of the large salt crystal present which is composed of many ions. E) The water molecules make the crystal very brittle.

2. In ionic bonds, valence electrons are:
A) equally shared; B) transferred; C) destroyed; D) unequally shared; E) swapped for protons.

3. Which one of the following is an ionic compound?
A) FOH B) H2SO4 C) C(OH)4 D) Mg2N3 E) C2H5OH

4. Sodium atoms and sodium ions:
A) have the same atomic size; B) have the same chemical properties; C) have the same number of electrons; D) have the same number of protons; E) have the same number of electrons and protons.

5. The electronic configuration of five pairs of elements are shown below. Which pair of elements is most likely to form an ionic bond?
A) 2,8,7 and 2,6 B) 2,8,1 and 2,6 C) 2,8 and 2,6 D) 2,8,1 and 2,3 E) 2,3 and 2,2

6. Below are the atomic numbers of five unknown elements. Element "X" has an atomic number of 13. Element "Y" has an atomic number of 17. Element "Z" has an atomic number of 12. Element "T" has an atomic number of 15. Element "H" has an atomic number of 16. A reaction between which two elements is likely to produce a compound with the formula A2B3?
A) A reaction between elements "Y" and "H". B) A reaction between elements "T" and "H". C) A reaction between elements "X" and "Y". D) A reaction between elements "X" and "H". E) A reaction between elements "X" and "T".

7. Which one of the elements below has a structure composed of positive ions surrounded by free moving electrons? “X” with an electronic configuration 2,8,3 “Y” with an electronic configuration 2,8,5 “T” with an electronic configuration 2,8,7 “A” with an electronic configuration 2,8,8,5 “Z” with an electronic configuration 2,8,18,6
A) "X" B) "Y" C) "T" D) "A" E) "Z"

8. Metals can conduct electricity in the solid state. What does this tell us about the structure of metals?
A) Metals have charged particles that are free to move in the solid state. B) Metals have tightly packed ions in a three dimensional lattice. C) Strong forces exist between particles in a metal. D) Forces between particles act in all directions in the solid metal lattice. E) Positive ions occupy fixed positions in the metal lattice.

9. The electronic configurations of five elements are listed below. “X” = 2,8,8,1 “Y” = 2,8,7 “Z” = 2,8,18,7 “A” = 2,8,6 “T” = 2,8,18,2 Which of the elements above conduct electricity in the solid state?
A) “X” and “Y” B) “X” and “T” C) “Z” and “Y” D) “Y” only E) ”T” only

10. Look at the structure on the right. Which one of the following elements is most likely to have formed this structure?
A) Element "E" with an electronic configuration 2,8,18,7 B) Element "B" with atomic number 10. C) Element "C" with atomic number 19. D) An element with atomic number 20. E) Element "E" with an electronic configuration 2,8,7

11. Which of the following is a property of metals?
A) Metals are normally gases or liquids at room temperature. B) Metals are either poor electrical conductors, or non-conductors. C) Metals are able to be hammered into sheets. D) Metals are dull, with little or no shine. E) Metals can not be bent into different shapes.

12. The fact that most metals have high melting points indicates that:
A) the particles are packed closely together; B) metals can absorb a great deal of heat; C) metals have delocalised electrons; D) the forces between the particles in a metal a very strong; E) metals are good reflectors of light energy.

13. Which one of the following can be explained by the metallic bonding model?
A) Differences in melting temperature between metals B) The malleability of metals. C) Differences in electrical conductivity between metals. D) Diffferences in density between metals E) Magnetic nature of metals such as iron, cobalt and nickel.

14. Which of one of the following comments it true?

A) Magnesium metal contains neutral atoms in amongst delocalised electrons. B) Sodium metal contains cations with the same electronic configuration as neon. C) Aluminium metal contains cations with the same electronic configuration as helium. D) Calcium metal contains neutral atoms with the same electronic configuration as neon. E) Potassium metal contains negatively charged ions in a sea of delocalised protons.

15. Which one of the following is not present in a solid metal.
A) Free moving negatively charged particles. B) Free moving protons. C) Positive ions (cations). D) Cations fixed in position. E) Fixed positive charges and free moving negative charges.

16. Which formula represents calcium phosphate? Calcium (Ca2+) Phosphate(PO43-)
A) Ca3(PO4)2 B) Ca2(PO4)3 C) Ca(PO4)2 D) CaPO4 E) (Ca)3(PO4)2

17. Which formula from the list given below represents ammonium sulfide? Ammonium(NH4+) Sulfide (S2-).
A) (NH4)2S B) S2(NH4) C) (S)2(NH4) D) (NH4)S2 E) (NH4)S

18. A bottle was labelled Al2(CO3)3. The name of the compound is
A) Aluminium carbonate B) Dialuminium tricarbonate C) tricarbonate dialuminium D) Alum tricarbonate E) Carbonate of aluminium

19. Jonathon was given a bottle with the formula (NH4)2Cr2O7 written on the label. The bottle contains
A) chromium diammonium. B) ammonium dichromate. C) diammonium(II)dichromate. D) dicromate(II)diammonium. E) ammonium heptoxide.

20. The sulfate ion(SO42-) has a charge of 2- . An unknown ion (X) forms the compound X2(SO4)3. Given that the chloride ion (Cl-) has a charge of 1-, Which one of the following compounds is possible when "X" reacts with the chloride ion?
A) X2Cl B) XCl C) XCl3 D) X3Cl2 E) XCl7