How Can We Identify a Particular Element

Question

How can we identify a particular element?
A) by its number of protons
B) by its number of electrons
C) by its number of neutrons
D) by its shape of valence shells
E) by its amount of energy levels

Accepted Answer

The number of protons in an atom, also known as the atomic number, uniquely identifies an element. This is because each element has a specific number of protons that distinguishes it from other elements.