Bohr Radius Calculator

To find the Bohr radius of an electron in a hydrogen atom, multiply the square of the principal quantum number by the Bohr radius constant (a₀). The Bohr radius constant has a standard value.

Bohr Radius Calculator

Enter any 1 value to calculate the missing variable

Principal Quantum Number (n) Bohr Radius

Meters (m) Centimeters (cm) Millimeters (mm) Inches (in) Feet (ft)

Calculate Reset

The Bohr Radius Calculator allows you to find out the radius of an electron’s orbit in a hydrogen atom. It uses the Bohr model. Moreover, the Bohr radius represents the most probable distance between the nucleus and the electron in its ground state.

It is crucial in atomic physics and quantifies the size of the hydrogen atom. The formula involves a constant known as the Bohr radius constant (a₀), which is approximately 0.529 Ångströms.

Formula:

$$r = a₀ \times n^2$$

Variable	Description
r	Bohr radius (in meters)
a₀	Bohr radius constant (0.529 Å = 5.29 × 10⁻¹¹ m)
n	Principal quantum number (integer value)

Solved Calculation:

Example 1:

Given:

• Bohr radius constant ($a₀$) = $5.29 \times 10^{-11}$ m
• Principal quantum number ($n$) = 1

Step	Calculation
Calculate Bohr radius	$r = 5.29 \times 10^{-11} \times 1^2$
Result	$r = 5.29 \times 10^{-11}$

Answer: The Bohr radius for $n = 1$ is approximately $5.29 \times 10^{-11}$ m.

Example 2:

Given:

• Bohr radius constant ($a₀$) = $5.29 \times 10^{-11}$ m
• Principal quantum number ($n$) = 2

Step	Calculation
Calculate Bohr radius	$r = 5.29 \times 10^{-11} \times 2^2$
Result	$r = 5.29 \times 10^{-11} \times 4$

Answer: The Bohr radius for $n = 2$ is approximately $2.12 \times 10^{-10}$ m.

What is Bohr Radius Calculator?

The Bohr Radius Calculator is fine tool for individuals. It helps you figure out the radius of an electron orbit in the Bohr model of an atom. This calculator is based on Bohr’s formula, which describes the relationship between an electron’s orbit in a hydrogen atom and fundamental physical constants.

Understanding Bohr’s Radius:

The Bohr radius is a crucial concept in atomic physics as it establishes the scale for atomic structures in the Bohr model. It helps calculate the electron’s distance from the nucleus for hydrogen-like atoms. Value in angstroms: 1 Bohr radius ≈ 0.529 Å.

This concept is typically introduced in class 11 physics while discussing atomic structure and the hydrogen atom. Bohr’s model calculations involve determining the radius, energy, and frequency for electrons in different orbits.

FAQs

1. What is the Bohr radius formula shortcut?:

The formula can be represented simply as $a_0 \approx 0.529 \, \text{Å}$.

2. What is the radius of the 3rd Bohr orbit?:

The radius of the nth orbit is given by $r_n = n^2 \cdot a_0$, where n is the principal quantum number.

Final Words:

Taken everything into account, this calculator is useful for quickly calculating the radius of an electron’s orbit or understanding the basic structure of an atom according to the Bohr model.