Atomic structure
- Created by: jaaaz_v
- Created on: 18-05-15 21:09
View mindmap
- Atomic Structure
- The basic structure of an atom is a small nucleus made up of protons and neutrons, surrounded by electrons
- Protons and neutrons have a mass of 1, while electrons have a mass of 1/2000
- Protons have a + charge, neutrons have no charge, and electrons have a - charge
- Number of electrons = the number of protons in the nucleus
- Atoms have no overall electrical charge
- Rutherford and Marsden
- Tried firing a beam of alpha particles at thin gold foil
- Expected positively charges alpha particles to be deflected by the electrons in the plumb pudding model
- Most alpha particles went straight through
- Meant that the mass of an atom was concentrated in the nucleus
- Nucleus must have a positive charge since it repelled the positive alpha particles
- Plumb pudding
- Thomson suggested that atoms were spheres of positive charge
- Tiny negative electrons stuck to the positive charged spheres
- Like plums in a pudding
- The basic structure of an atom is a small nucleus made up of protons and neutrons, surrounded by electrons
Comments
No comments have yet been made