The atomic number is denoted by the alphabet-

Correct option is C

The correct answer is (C) Z

The atomic number of an element is denoted by the symbol "Z". It represents the number of protons present in the nucleus of an atom. Since atoms are electrically neutral, the atomic number also equals the number of electrons in an uncharged atom.

For example, hydrogen (H) has an atomic number (Z) of 1, meaning it has one proton in its nucleus. Similarly, oxygen (O) has an atomic number (Z) of 8, indicating it has eight protons.

Information Booster:

• Atomic number (Z) determines the identity of an element.
• Mass number (A) is the sum of protons and neutrons in the nucleus.
• Isotopes of an element have the same atomic number but different mass numbers due to varying numbers of neutrons.
• The periodic table is arranged in increasing order of atomic number (Z).

Additional Information:

• (A) A: Represents the mass number (protons + neutrons).
• (B) X: Used to denote a general chemical element in formulas.
• (D) N: Represents the number of neutrons in an atom.