Plum pudding model

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/plum-pudding-model

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the proposed year?1904
2. What is the atomic composition?A sphere of diffuse positive charge with embedded electrons
3. What was the Plum Pudding Model of the atom?It pictured the atom as a sphere of positive charge with electrons embedded like raisins in pudding. It was J.J. Thomson's idea from 1904.
4. Why did scientists call it the "plum pudding" model?Because the electrons were imagined like plums or raisins in a pudding, making it easy to explain. The name was given later by writers, not Thomson himself.

Subatomic Particles: Particles smaller than an atom, such as electrons, protons, and neutrons.
Electrical Neutrality: The state of an atom having an equal amount of positive and negative electric charge.
Alpha Particle Scattering: An experiment where alpha particles are directed at a thin metal foil to study atomic structure.
Atomic Nucleus: The dense, positively charged center of an atom, discovered by Rutherford.