What you’ll learn2 learning objectivesChoose one objective for a focused lesson, or study the complete topic.9.1.1Period 3 physical property trends• Describe qualitatively (and indicate the periodicity in) the variations in atomic radius, ionic radius, melting point and electrical conductivity of the elementsSyllabus objective9.1.2Variation in melting point and electrical• Explain the variation in melting point and electrical conductivity in terms of the structure and bonding of the elementsSyllabus objective