Physical and Chemical Properties

Properties of elements are determined by: The number of electrons in the outer shell (energy level) The number of protons in the nucleus Elements are arranged on the periodic table in: Periods – Rows of increasing atomic number (increasing amounts of electrons in the outer shell (energy level)) Groups – Columns that share similar physical and chemical properties (because of the number of electrons in the outer shell)

Shine or Luster: Physical Property The property of an element to reflect light giving it a metallic shiny, glittery, or mirror-like reflective quality. A property of most metals and some metalloids Opposite of Shine or Luster is dull A property of most nonmetals Physical Property

Malleability: Physical Property The property of an element to be pounded into thin flat sheets. A property of most solid metals Opposite of malleable is brittle Most metalloid solids and nonmetal solids Physical Property

Ductility: Physical Property The property of an element to be stretched into a thin wire. A property of most metals Opposite of ductile is brittle Most metalloid solids and nonmetal solids Physical Property

Conductive: Physical Property The property of an element to pass heat or electricity through it. Also includes electromagnetism. A property of most metals The opposite of conductive is resistive or insulator (nonconductive) Most metalloids (at room temperature) and nonmetals are resistive or insulators Physical Property

Corrosion: Chemical Property The property of an element to be worn away and changed to something new due to a chemical change. A property of most metals Many nonmetals act as corrosives Chemical Property

Reactivity: Chemical Property The ease and speed with which an element combines, or reacts with other elements. Property of some metals, nonmetals, and metalloids Chemical Property

Flammability Chemical Property Ability to burn or support combustion. Property of some metals, nonmetals, and metalloids Chemical Property