The atom
Core concepts and learning points for this section:
Syllabus Points
Core
- 5.1.1.1 Describe the structure of an atom in terms of a positively charged nucleus and negatively charged electrons in orbit around the nucleus
- 5.1.1.2 Know how atoms may form positive ions by losing electrons or form negative ions by gaining electrons
Supplement
- 5.1.1.3 Describe how the scattering of alpha ( α ) particles by a sheet of thin metal supports the nuclear model of the atom, by providing evidence for: (a) a very small nucleus surrounded by mostly empty space (b) a nucleus containing most of the mass of the atom (c) a nucleus that is positively charged