S3 13.1 and 13.2 Atoms, Elements, and the Periodic Table скачать в хорошем качестве

S3 13.1 and 13.2 Atoms, Elements, and the Periodic Table

The video is an excerpt from a quick revision guide for science, offering a foundational overview of atoms and elements as part of Unit 13. It begins by defining atoms and elements, explaining that elements are made of only one kind of atom and introducing the concept of a molecule and the use of chemical symbols and formulas. A significant portion of the text classifies elements into metals, non-metals, and semi-metals, contrasting their physical properties like density, conductivity, and malleability. Furthermore, the video details atomic structure, describing the nucleus, protons, neutrons, and electrons, while also defining the atomic number (Z) and mass number (A). Finally, it explains how atoms form ions by gaining or losing electrons and briefly introduces the concept of the Periodic Table, where elements are arranged by increasing atomic number into groups with similar properties.