Atom and kernel structure

Содержание и основные понятия

This chapter links observed phenomena, physical models, and mathematical laws, first form a qualitative picture, then explore the relationships in interactive models.
GEF · Grade 9
PIF · Baseline
theory + model
16
Chapter Pages
Three meaningful routes: concepts, laws, and model research.
16.1
Atom models
From particle dispersion to nuclear atom
16.2
Radioactive activity
Self-involved conversion of kernels
16.3
Nuclear reactions
Division, synthesis and mass defect
→
Study route
16.1 Atom models
- The experience of Christopherford has shown that the positive charge and almost the mass of the atom are concentrated in a small core, and the electronic shell takes up the bulk.
16.2 Radioactive activity
- Unstable kernels break up spontaneously with the emission of particles or electromagnetic radiation, and for a large ensemble, the number of unsprayed kernels drops by the exhibit.
16.3 Nuclear reactions
- The nuclear response changes the composition of the kernel, and the energy difference is manifested as the generation or absorption of energy. A small mass defect corresponds to a large energy.
Basis of contents:
The federal work programme on physics, the GEF OSL/GS and the thematic sequence of popular school lines are written specifically for Alterna and does not reproduce textbooks.