Question

Name the metal which burns in the air with a golden flame?

Answer 1

• All metals combine or react with air or Oxygen to form metal oxides.
• The reactivity of metals with Oxygen or air forming an oxide depends on the nature of metals.
• The metal that burns or reacts with air at room temperature is Sodium.
• During the reaction yellow to golden colour flame is formed.
• The reaction is as follows:

$\underset{\left(\mathrm{Sodium}\right)}{4\mathrm{Na}\left(s\right)}+\underset{\left(\mathrm{Oxygen}\right)}{{\mathrm{O}}_2\left(\mathrm{g}\right)}\stackrel{\mathrm{Room}\mathrm{temperature}}{\to }\underset{\left(\mathrm{Sodium}\mathrm{oxide}\right)}{2{\mathrm{Na}}_2\mathrm{O}\left(\mathrm{s}\right)}$