The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...

Chemists use symbols and formulae to represent elements and compounds. Word equations and balanced chemical equations represent the changes that happen in chemical reactions. Mixtures - AQA There ...

They can have different labels on the groups or numbers in the rectangles. However, the elements never move places. The periodic table's layout means we can make predictions about elements based ...