Predict the type of bond that will form between two atoms based on their
valence electrons.
What type of bond is expected between magnesium and chlorine?
Magnesium (Mg) is a metal and chlorine (Cl) in a non-metal.
Therefore an ionic bond is expected to form.
Choose a compound with similar properties to a given compound based on
periodicity.
Which compound has properties most similar to NaCl: KCl,
CaCl2, or ClF?
All compounds show an bond with chlorine (Cl). Sodium (Na) and
potassium (K) are in the same group and therefore have analagous
properties. We can expect KCl and NaCl to have analagous properties.
Predict the charge on an atom by its location on the periodic table.
What charge does a calcium atom form when it becomes an ion?
Calcium (Ca) is in group 2. Group 2 elements have 2 valence
electrons. They lose their 2 valence electrons to form 2+
cations. (Ca2+)