Ptable is an interactive periodic table that shows various properties and data of the elements. You can search for elements by atomic number, name, symbol, or block, and filter by scale, color, or decay mode.

Learn how the physical properties of the elements vary across the periodic table. See how atomic radius, electron affinity, electronegativity, ionization energy, and metallic/nonmetallic character change as you move left to right and down the table.

Interactive periodic table with element scarcity (SRI), discovery dates, melting and boiling points, group, block and period information.

Learn how the periodic table shows different aspects of elements when grouped by period and group. Find out the major periodic trends, such as atomic radius, ionization energy, electronegativity, valency and metallic character, and their explanations.

Learn how the properties of elements vary across the periodic table based on their atomic number and electronic configuration. Explore the trends in atomic size, metallic and non-metallic character, ionization potential, melting and boiling points, and more.

Learn about the patterns of atomic structure and properties of elements in the periodic table. Explore the trends of atomic radius, electronegativity, ionization energy, electron affinity, and metallic and non-metallic character across periods and groups.

Learn how the properties of elements change along the groups and periods of the periodic table with simple explanations and diagrams. Find out the trends of valency, atomic radius, metallic character, nonmetallic character, electronegativity, electron affinity and ionization energy.

Periodic table, in chemistry, the organized array of all the chemical elements in order of increasing atomic number. When the elements are thus arranged, there is a recurring pattern called the ‘periodic law’ in their properties, in which elements in the same column (group) have similar properties.

Properties of elements generally show a periodic trend that correlates with their position in the periodic table. The properties and their periodic trends are described below. Valence electrons. Electrons in the outermost shell are the valence electrons. Fig. 2.5.8 shows the valence electrons of the first twenty elements in red fonts.