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Chem 3

TermDefinition
Chemical Bond Force of attraction that holds atoms together in a compound
Ionic bond electrostatic attraction of ions of opposite charge -metal ion bonded to nonmetal ion.
Cation radius A cation always has a smaller radius than its parent neutral atom
Anion radius An anion always has a larger radius that it's parent
Bond energy amount of energy that must be absorbed to break a bond -When a bond is formed, energy is released
Electronegativity ability of an atom to attract electrons to itself in a chemical bond. -It decreases from top to bottom of a group. Na vs K, Na has a greater electronegativity -Electronegativity increases from left to right across a period Na vs Cl. Cl is grater.
Polar Covalent Bond Unsymmetrical distribution/ unequal, less electronegative atom
Non-Polar Pure covalent Bond. H-H. Symmetrical distribution of equal sharing of bonding electrons.
What if electronegativity difference equals O? Then the bond is nonpolar covalent.
What if electronegativity difference is grater than O? Then the bond is polar covalent.
Octet Rule Eight electrons around each atom except H. Hydrogen can only have 1 bond. no dots around H!!
Metallic Character it's a level of radioactivity of a metal. Metals tend to lose electrons in chemical reactions, as indicated by their low ionization energies. Within the compoud, metal atom have relatively low attraction for electrons, as indicated by their low electroneg
I A Group Alkali Metals.Very reactive, react with water. +1
II A Group Alkaline Earth Metals.strong, good density
Group 7A Halogens. most reactive nonmetal -1
Group 8A Noble gases.
Atomic radius it's the distance from the nucleus to the outermost electrons
Atomic radii decreases (1 part) from bottom to top. -because there are fever energy levels of electrons surrounding nucleus -As the number of energy levels decreases, the distance from nucleus to outermost electrons decreases.
Atomic radii decreases (2 part)
Created by: MedSunny
 

 



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