Write the Electron Configuration for a Neutral Atom of Iodine
Atom Diagrams Showing Electron Shell Configurations of the Elements
Updated November 05, 2019
It's easier to understand electron configuration and valence if you can actually see the electrons surrounding atoms. For that, we have electron shell diagrams.
Here are electron shell atom diagrams for the elements, ordered by increasing atomic number.
For each electron shell atom diagram, the element symbol is listed in the nucleus. The electron shells are shown, moving outward from the nucleus. The final ring or shell of electrons contains the typical number of valence electrons for an atom of that element. The element atomic number and name are listed in the upper left. The upper right side shows the number of electrons in a neutral atom. Remember, a neutral atom contains the same number of protons and electrons.
The isotope is defined by the number of neutrons in an atom, which might be equal to the number of protons—or not.
An ion of an atom is one in which the number of protons and electrons is not the same. If there are more protons than electrons, an atomic ion has a positive charge and is called a cation. If there are more electrons than protons, the ion has a negative charge and is called an anion.
Elements are shown from atomic number 1 (hydrogen) up to 94 (plutonium). However, it's easy to determine the configuration of electrons for heavier elements by making a chart.
Hydrogen
Helium
Lithium
Lithium is the first element in which an additional electron shell is added. Remember, the valence electrons are found in the outermost shell. The filling of the electron shells depends on their orbital. The first orbital (an s orbital) can contain only two electrons.
Beryllium
Boron
Carbon
Nitrogen
Oxygen
Fluorine
Neon
Sodium
Magnesium
Aluminium
Silicon
Phosphorus
Sulfur
Chlorine
Argon
Potassium
Calcium
Scandium
Titanium
Vanadium
Chromium
Manganese
Iron
Cobalt
Nickel
Copper
Zinc
Gallium
Germanium
Arsenic
Selenium
Bromine
Krypton
Rubidium
Strontium
Yttrium
Zirconium
Niobium
Molybdenum
Technetium
Ruthenium
Rhodium
Palladium
Silver
Cadmium
Indium
Tin
Antimony
Tellurium
Iodine
Xenon
Caesium
Barium
Lanthanum
Cerium
Praseodymium
Neodymium
Promethium
Samarium
Europium
Gadolinium
Terbium
Dysprosium
Holmium
Erbium
Thulium
Ytterbium
Lutetium
Hafnium
Tantalum
Tungsten
Rhenium
Osmium
Iridium
Platinum
Gold
Mercury
Thallium
Lead
Bismuth
Polonium
Astatine
Radon
Francium
Radium
Actinium
Thorium
Protactinium
Uranium
Neptunium
Plutonium
Write the Electron Configuration for a Neutral Atom of Iodine
Source: https://www.thoughtco.com/atoms-diagrams-electron-configurations-elements-4064658
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