Chapter 16, Problem 1STP

To determine

To Choose: The correct option.

Answer to Problem 1STP

Option C. Protons.

Explanation of Solution

Introduction:

The atomic number is defined by the number protons in the element. It is the unique characteristic of each and every element in the periodic table. 

The sum of neutrons and protons is the atomic mass of an element. The neutrons are different for different isotopes of the element but the protons are common in each isotope. 

The atomic number is based on the number of protons present in the atom irrespective of the neutrons that are present in an element and the proton is the only unique character of each element.

Therefore, the protons can identify each particular element in the periodic table. 

Conclusion: 

Protons can identify each particular element.