1. What is Atomic Number?

The atomic number (Z) represents the number of protons found in the nucleus of an atom. It uniquely identifies a chemical element and determines its position in the periodic table.

2. How Does the Calculator Work?

The calculator uses the fundamental atomic number formula:

Where:

• \( Z \) — Atomic number
• Protons — Number of protons in the atomic nucleus

Explanation: Each element has a unique atomic number that defines its chemical properties and position in the periodic table.

3. Importance of Atomic Number

Details: The atomic number is fundamental to chemistry and physics. It determines an element's chemical behavior, electron configuration, and all chemical properties. Elements are arranged in the periodic table according to increasing atomic number.

4. Using the Calculator

Tips: Select an element from the dropdown menu to calculate its atomic number. The calculator will display the number of protons in the nucleus of that element's atoms.

5. Frequently Asked Questions (FAQ)

Q1: What is the relationship between atomic number and mass number?
A: Atomic number (Z) = number of protons. Mass number (A) = protons + neutrons. They are related but distinct concepts.

Q2: Can atomic number change in chemical reactions?
A: No, atomic number remains constant in chemical reactions. Changes in atomic number only occur in nuclear reactions.

Q3: What are some examples of atomic numbers?
A: Hydrogen Z=1, Helium Z=2, Carbon Z=6, Oxygen Z=8, Gold Z=79, Uranium Z=92.

Q4: How is atomic number related to the periodic table?
A: Elements are arranged in order of increasing atomic number, with periods (rows) and groups (columns) showing periodic trends in properties.

Q5: What is the significance of atomic number in isotopes?
A: Isotopes of an element have the same atomic number (same number of protons) but different numbers of neutrons, giving different mass numbers.