Question
How do metals react with oxygen?
✓
Answer
Metals combine with oxygen on heating in air and metal oxides are formed.
Metal + Oxygen $\rightarrow$ Metal oxide
$2 Na _{( s )}+ O _{2( g )} \longrightarrow Na _2 O _{( s )}$
Sodium oxide
$2 Mg _{( s )}+ O _{2( g )} \longrightarrow 2 MgO _{( s )}$
Magnesium oxide
Metal + Oxygen $\rightarrow$ Metal oxide
$2 Na _{( s )}+ O _{2( g )} \longrightarrow Na _2 O _{( s )}$
Sodium oxide
$2 Mg _{( s )}+ O _{2( g )} \longrightarrow 2 MgO _{( s )}$
Magnesium oxide
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ii. $\quad 2 M g + O _2 \longrightarrow 2 M g O$
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