The elements in the periodic table are listed i... - JAMB Chemistry 2018 Question

The periodic table arranges elements based on their properties, which are determined by their atomic structure. The key concept here is how elements are ordered.

• A. relative atomic number: Elements are arranged in order of increasing atomic number (number of protons). This arrangement reflects the periodic law, where properties of elements are a periodic function of their atomic numbers.
• B. atomic mass: While atomic mass generally increases across the periodic table, the modern periodic table is not strictly based on atomic mass. There are instances where elements are out of order by mass (e.g., tellurium and iodine) to maintain the correct chemical property trends.
• C. relative isotopic mass: This refers to the mass of an isotope, not the fundamental basis for arranging the entire periodic table.
• **D.