Question

Find out the odd one. Give the reason for your choice

• A. $\mathrm{Sulphur}$
• B. $\mathrm{Carbon}$
• C. $\mathrm{Sodium}$
• D. $\mathrm{Phosphorous}$

Answer 1

The correct option is C

$\mathrm{Sodium}$

The explanation for the correct answer

Option C

• $\mathrm{Sodium}$ is a chemical element with symbol $\mathrm{Na}$ and atomic number$11$.
• $\mathrm{Sodium}$ is a soft, silvery-white highly reactive metal.

The explanation for the incorrect answers

Option A

• $\mathrm{Sulphur}$ is a chemical element with symbol $\mathrm{S}$ and atomic number $16$.
• It is an abundant, multivalent, and non-metallic element.

Option B

• $\mathrm{Carbon}$ is a chemical element with symbol $\mathrm{C}$ and atomic number $6$.
• It is a tetravalent nonmetallic element making 4 electrons available to form a covalent bonds.

Option D

• $\mathrm{Phosphorous}$ is a chemical element with symbol $\mathrm{P}$and atomic number $15$.
• Elemental $\mathrm{Phosphorous}$ exists in two major forms, which are $\mathrm{White}\mathrm{Phosphorous}$ and $\mathrm{Red}\mathrm{Phosphorous}$.
• It is a highly reactive non-metal, hence they do not found in the free state.

Thus, option C i.e.$\mathrm{Sodium}$ is the correct option.