Zusammenfassung der Ressource
Atoms, elements and compounds
- Mixtures can be separated into simpler substances with fewer parts.
- A compounds can be broken down into simpler compounds or its elements.
- Elements are substances that cannot be broken down by chemical reactions into simpler substances.
- Inside the atom
- Sub-atomic particles have both a charge and a mass. You can work out the mass of an atom by adding together the numbers of protons and neutrons.
- Since an atom had equal numbers of protons and electrons, the charges cancel out.
- Neutrons have no charge and are neutral.
- The sum of the number of protons and neutrons in an atom is its mass number.
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