The Reactivity of Metals
Metals vary greatly in their reactivity levels. The most reactive metals are found in Groups 1, 2 and 3 of the periodic table, including potassium, sodium, calcium and aluminium. Transition metals like iron, copper and zinc have medium reactivity, while gold, silver and platinum are notably unreactive.
When metals react with oxygen, they form metal oxides through a process called oxidation. The chemical equation follows the pattern: Metal + oxygen → metal oxide. For example, magnesium burns brightly in oxygen to form magnesium oxide (2Mg + O₂ → 2MgO).
Group 1 metals like potassium, sodium and lithium react extremely vigorously with oxygen even at room temperature. Medium-reactive metals like magnesium, zinc and iron react more slowly or require heating. The least reactive metals like gold and platinum don't react with oxygen at all.
Remember: The more reactive a metal is, the more vigorously it reacts with oxygen. Group 1 metals can be dangerous to handle because they react so readily with both oxygen and water!
