like atomic mass and chemical symbol. The periodic table’s arrangement also allows scientists to discern trends in element properties, including electronegativity, ionization energy, and atomic radius ...

Reaction pathway diagrams display information about the energy changes during chemical reactions. Chemical energy Energy changes occur in chemical reactions as bonds are broken and new bonds formed.

Hess’s Law states that the enthalpy change for a chemical reaction is independent ... This is shown in the diagram below. One method of calculating an enthalpy change for a process involves ...