Checkpoint.
Q1. Look at the ten compounds below, and decide whether the bonding will be ionic, covalent or metallic. You may need a periodic table to help you decide which elements are metals and non-metals.
a. potassium chloride (KCl)
b. carbon dioxide (CO2)
c. hydrogen chloride (HCl)
d.carbon dioxide (CO2)
e. iron oxide (Fe2O3)
f. magnesium iodide (MgI2)
g. fluorine gas (F2)
h. brass (a mixture of zinc and copper)
i. ammonia (NH3)
j. calcium carbonate (CaCO3)
Q2. Which of the compounds above are molecules?
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