Chemistry Report: Structure, Periodic Table, Bonding, and Elements

This report, prepared by a student, comprehensively explores the concepts of atomic structure, the periodic table, and chemical bonding. It begins by calculating the relative atomic mass (Ar) of magnesium and chromium using data from provided information sheets, detailing the steps involved and explaining the calculations based on isotope percentages. The report then delves into electronic configurations, deducing these for magnesium and chromium atoms and their ions (Mg2+ and Cr3+), explaining how electrons are arranged in subshells and orbitals according to the Aufbau principle and Hund's rule. Finally, it discusses the positioning of magnesium and chromium within the periodic table, classifying magnesium as an s-block element and chromium as a d-block element, describing the characteristics of each block and their respective groups.