• Jun 12, 2026 electron configurations chemical periodicity answers ecreasing atomic size. As you descend a group (column), additional electron shells are added, increasing atomic size despite the increasing nuclear charge. Trends in Atomic Properties Using electron configurations, we can explain various periodic trends: Atomic Radius: Decreases across a period By Kenyon Breitenberg
• Aug 9, 2025 chemistry the periodic table and periodicity answers perties into columns. His foresight in leaving gaps for undiscovered elements and predicting their properties marked a turning point. Refinements and Modern Periodic Table Henry Moseley (1913): Established th By Mrs. Kristina Langosh MD
