Question

Which of the following elements has $17$electrons and $17$protons?

• A. Sodium
• B. Sulfur
• C. Aluminum
• D. Chlorine

Answer 1

The correct option is D

Chlorine

The explanation of the correct option:

D) Chlorine

• The atomic number of Chlorine is $17$and is represented as ${}_{17}^{35}\mathrm{Cl}$
• A number of protons are the atomic number of that element. In an element, the number of protons is equal to the number of electrons.
• Therefore, chlorine has $17$protons and $17$electrons.

The explanation of incorrect options:

A) Sodium

• The atomic number of sodium is $11$ and is represented as ${}_{11}{}^{23}\mathrm{Na}$
• The number of protons and number of electrons in sodium is $11$and$11$ respectively.

B) Sulphur

• The atomic number of sulfur is $16$ and is represented as ${}_{16}{}^{32}\mathrm{S}$
• It has a total of$16$ protons and $16$electrons

C) Aluminium

• The atomic number of aluminium is $13$ and is represented as ${}_{13}{}^{27}\mathrm{Al}$
• It has a total of$13$ protons and$13$ electrons.

Hence, the correct option is D) Chlorine