What you’ll learn3 learning objectivesChoose one objective for a focused lesson, or study the complete topic.5.1.1.1Structure of an atom in terms of a• Describe the structure of an atom in terms of a positively charged nucleus and negatively charged electrons in orbit around the nucleusSyllabus objective5.1.1.2How atoms may form positive ions by• Know how atoms may form positive ions by losing electrons or form negative ions by gaining electronsSyllabus objective5.1.1.3Alpha-particle scattering by thin• Describe how alpha-particle scattering by thin metal supports the nuclear atom: (a) tiny nucleus with mostly empty space around it (b) nucleus contains most atomic mass (c) nucleus is positively chargedSyllabus objective