Question

Sodium, iron, oxygen, calcium
find odd one out

Answer 1

Answer:

Oxygen

Reason:

Oxygen is non-metal while Sodium, Iron and Calcium are metals.

More to know:

• Oxygen is an odourless, colourless and tasteless gaseous element.
• Metals like Sodium, Iron and Calcium basic oxides.
• Non metals like Oxygen form acidic oxides.
• Metals form cations.
• Non-metals form anions.
• Metals form ionic compounds while non-metals form ionic and covalent compounds both.