The tendency of an atom to attract the shared pair of electrons towards itself is known as electronegativity.Įlectronegativity increases across a period. In halogens chlorine posses highest electron affinity in the periodic table. Halogens posses’ highest electron affinity in the periodic table. The zero group elements have the lowest electron affinity values. The electron affinity increases across a period while it decreases down a group. With the increase in nuclear attraction force the electron in the valence shell binds strongly to the atom. Thus electron affinity will be more for smaller atomic size elements.Įlectron affinity increases with increase in the nuclear charge. They are atomic size and nuclear charge.Ītomic size: As the atomic size increases the nucler attraction force on the valence shell decreases. The unit for electron affinity is kilo joules per mole. The energy released when an electron is added to a neutral gaseous atom is known as electron affinity. Helium has the highest ionization energy in the periodic table while cesium has the lowest ionization energy. The following graph gives decrease of IE in group-1. Ionization energy decreases down the group due increase due to increase in the atomic size (addition of new shell). The following depicts the increase of IE in period. Ionization energy increases across a period due to increase in the nuclear charge. The unit for ionization energy is electron volts or kilo joules per mole. Ionization Energy is the minimum energy required to remove the outermost electron from a gaseous neutral atom to form a cation. The graph below shows decreasing order of atomic radius in period:Ītomic radius increases down the group due to addition of new shell.įollowing graph shows increasing order of atomic radius in group: The atomic radius decreases across a period due to increase in nuclear charge. Atomic radius is expressed in angstrom units. Important periodic properties are:Ītomic radius is the distance from the centre of the nucleus to the valence electron in an energy level. The trend of recurrence of properties is called periodicity.
Modern periodic table pdf file pdf#
Tip: You can create your own mini periodic table poster by printing on 11x17 paper.ĥ/28/11: Update (Version 1.1) - Added indicator for radioactive elements, color-coded melting and boiling point data, added the crystal structure (in place of the van der Waals radius), and marked the atomic radius as either the metallic radius (m) or covalent radius (v).ĩ/7/16: Updated the Excel and PDF files to correctly classify Radon as a gas.The term periodic properties in elements, refers to the properties that recur at regular intervals. You can use this data table for creating trend charts or use lookup functions to use the data within calculations.
Modern periodic table pdf file download#
If you'd like to create your own personal custom periodic table, you can download this Excel file and add your own sets of properties.ĭata: The spreadsheet also includes a worksheet that lists the property data for the elements. This spreadsheet was used to create the printable periodic table above and also contains a worksheet listing the data for various chemical properties. "No installation, no macros - just a simple spreadsheet" - by Jon Wittwer and Brent Weight Description
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