An atom's atomic number is determined by the number of(1 Point)protons in its nucleusnucleons in its nucleuselectrons in its nucleusneutrons in its nucleus

Break Down the Problem

1. Identify the key terms: atomic number, protons, nucleons, electrons, neutrons.
2. Understand the definition of atomic number.

Relevant Concepts

• The atomic number (Z) of an element is defined as the number of protons found in the nucleus of an atom.
• Nucleons refer to both protons and neutrons together, but the atomic number specifically counts only protons.

Analysis and Detail

• Each element has a unique atomic number that determines its identity and position in the periodic table.
• Electrons are equal in number to protons in a neutral atom, but they do not contribute to the atomic number.
• Neutrons, while part of the nucleus, do not affect the atomic number but contribute to the atomic mass of the atom.

Verify and Summarize

Given the definitions and explanations above, it is clear that the atomic number is determined solely by the number of protons in the nucleus.

Final Answer

The atomic number of an atom is determined by the number of protons in its nucleus.