Periodic Table

• The periodic table is an arrangement of the elements according to their atomic number.
• Atomic Number - The total number of protons in the nucleus of an atom
• Mass Number - The sum of the proton and neutron numbers in the nucleus of an atom
• Periods (rows) represent increasing atomic numbers and proton counts.
• Elements are arranged into groups (columns) based on similarities in chemical properties, such as electron configuration or valence electrons.