This document discusses different types of bonding between atoms, including ionic and covalent bonding. It addresses why atoms form bonds, the types of bonds present in pure elements versus compounds, and examples of ionic compounds like NaCl, H2O and their structures. Multiple choice questions are also included to test understanding of ion formation, ionic compound formulas, and which processes contribute to making ionic bond formation energetically favorable.

1. Bonding

2. Learning objectives
Why do atoms form bonds?
Types of bonding
Formation of ions and ionic bonds
Properties of ionic compounds

3. Why do atoms form bonds?
A. Because it is
energetically
favourable to do so.
B. Because atoms are
inherently unstable.
C. Because they need
company.
D. Because some
atoms want to gain
electrons and some
want to lose
electrons.

4. What types of bonding are
there?

5. What type of bonding is not present in the
pure elements of the periodic table?
A. Covalent
B. Metallic
C. Ionic

6. H2O(s) contains molecules of H2O
A. True
B. False

7. NaCl(s) contains molecules of NaCl
A. True
B. False

8. NaCl(aq) contains molecules of NaCl
A. True
B. False

9. Give an example of an element
that forms metallic bonds

10. Which of the following ions
would have the smallest radius?
A. O2−
B. O−
C. O+
D. O2+

11. What is the formula of
aluminium sulfate?
A. AlSO4
B. Al2SO4
C. Al3(SO4)2
D. Al2(SO4)3

12. Na(s) + ½Cl2(g) → NaCl(s)
Which of two of these processes contribute to
making sodium chloride formation favourable?
A. Adding an electron to
chlorine atoms
B. Removing an electron
from sodium atoms
C. Forming an ionic lattice
D. Breaking the chlorine-
chlorine bond