# Bohr Model

More Options: Make a Folding Card

#### Storyboard Description

This storyboard does not have a description.

#### Storyboard Text

• The Neils Bohr model by Deanna Desranleau﻿
• Good morning students today ill be talking about the Neils Bohr model
• What was the scientific understanding about the atom before Niels Bohr made His discovery?
• ﻿
• well In 1911 Ernest Rutherford used “The Gold Foil Experiment” to prove that particles were made of both negative and positive atoms. In this experiment he shot alpha particles through the gold foil and while some of the particles went through the foil  some bounced off the foil.
• ﻿
• ﻿ What is some important information about Niels Bohr?
• well students one thing is He was born and educated in Copenhagen, Denmark He also won a gold medal from The Royal Danish Academy for designing a series of experiments that improved on Lord Rayleigh's model for measuring a liquid's surface tension.
• ﻿ What are the key points necessary to understand the atomic model?
• This model shows that the electron particles are orbiting around the nucleus like the planets around the sun. Bohr used the term energy levels (or shells) to describe these orbits of differing energy. He said that the energy of an electron is quantized, meaning electrons can have one energy level or another but nothing in between.
• What advantages does the Bohr model provide to scientists?﻿
• The Bohr model shows that the electrons in atoms are in orbits of differing energy around the nucleus (think of planets orbiting around the sun). Bohr used the term energy levels (or shells) to describe these orbits of differing energy. He said that the energy of an electron is quantized, meaning electrons can have one energy level or another but nothing in between.
• What are some drawbacks to the model of the atom?
• It is in violation of the Heisenberg Uncertainty Principle.  The Bohr Model considers electrons to have both a known radius and orbit, which is impossible according to Heisenberg. It does not explain the Zeeman Effect, when the spectral line is split into several components in the presence of a magnetic field. The Bohr Model does not account for the fact that accelerating electrons do not emit electromagnetic radiation.
Explore Our Articles and Examples

Try Our Other Websites!

Photos for Class – Search for School-Safe, Creative Commons Photos (It Even Cites for You!)
Quick Rubric – Easily Make and Share Great-Looking Rubrics
abcBABYart – Create Custom Nursery Art