S1. Models of the particulate nature of matter
This topic focuses on how scientists represent the fundamental building blocks of matter and explain their interactions. It covers the states of matter, atomic structure based on the nuclear model, and how electron arrangements influence chemical behaviour. Students also learn about the mole as a way to measure numbers of particles, and examine gas behaviour using the ideal gas law to predict and calculate gas properties.
- Introduction to the particulate nature of matter
- The nuclear atom
- Electron configurations
- Couting particles by mass: The mole
- Ideal gases
Introduction to the particulate nature of matter
Elements are the primary constituents of matter, which cannot be chemically broken down into simpler substances.
The nuclear atom
Atoms contain a positively charged, dense nucleus composed of protons and neutrons (nucleons).
Electron configurations
Emission spectra are produced by atoms emitting photons when electrons in excited states return to lower energy levels.
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