1. What is Atomic Number?

The atomic number of an element is the number of protons in the nucleus of its atom. It determines the chemical properties of the element and its place in the periodic table.

2. How Does the Calculator Work?

The calculator uses the fundamental relationship:

Where:

• Atomic Number — Unique identifier for each chemical element
• Protons — Positively charged particles in the atom's nucleus

Explanation: In a neutral atom, the atomic number also equals the number of electrons. The atomic number uniquely identifies each element.

3. Importance of Atomic Number

Details: The atomic number is fundamental to chemistry and physics. It determines:

• An element's position in the periodic table
• Its chemical properties
• The number of electrons in a neutral atom
• The element's identity (change in protons creates a different element)

4. Using the Calculator

Tips: Simply enter the number of protons in an atom. The calculator will return the atomic number, which is the same value.

5. Frequently Asked Questions (FAQ)

Q1: Can atomic number change for an element?
A: No, changing the number of protons creates a different element. Atomic number is fixed for each element.

Q2: What's the relationship between atomic number and mass number?
A: Mass number = protons + neutrons. Atomic number only counts protons.

Q3: Why is atomic number more fundamental than atomic weight?
A: Atomic number determines chemical properties, while atomic weight can vary with isotopes.

Q4: What's the highest known atomic number?
A: As of 2023, oganesson (Og) with atomic number 118 is the highest.

Q5: Can two elements have the same atomic number?
A: No, by definition each element has a unique atomic number.