Question

Sodium + oxygen = ?
Non metal + oxygen = ?
Metal + oxygen = ?

Answer 1

1. 2Na2O
2. Metal oxides
3. Non metal oxides

Hope it helps you...

Answer 2

$\huge \tt \color{purple} \star\: ANSWER \: \star$

By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.