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Chemistry Chpter 4


Periodic Law States that the repeating physical and chemical properties of elements change periodically with their atomic number.
Valence Electrons An electron that is found in the outermost shell of an atom and that determines the atom's chemical properties
Group A vertical column of elements in the periodic table, elements in a group share chemical properties.
Main-Group Elements An element in the s-block or p-block of the periodic table
Akali Metals Elements of group 1 (sodium, potassium, cesium)
Alkaline-Earth Metals Elements of group 2 (beryllium,calcium,radium)
Halogens Elements of group 17 (fluorine bromine,chlorine)
Noble Gases Un reactive element of Group 18 (helium,argon,krypton)
Transition Metals One of the metals that can use the inner shell before using the outer shell to bond
Ionization Energy The energy required to remove an electron from an atom or ion
Electron Shielding The reduction of the attractive force between a positively charged nucleus.
Bond Radius Half the distance from center to center of two like atoms that are bonded together
Electronegativity A measure of the ability of an atom in a chemical compound to attract electrons
Created by: joeyyuen