Shared Flashcard Set

Details

bonding 1
it's just.. lame.
25
Chemistry
11th Grade
10/23/2007

Additional Chemistry Flashcards

 


 

Cards

Term
electronegativity
Definition

the stregnth possesed by an atom to take an electron away.
the more protons it has, the more electrons it wants.

Term
electronegativity values
Definition
metals have lower values, non metals have higher values.
Term
ionization energy
Definition
the energy it takes to remove an electron.
Term
ionization values
Definition
metals have lower ionizatin energies because they tend to lose electrons more easily.
Term
how many electrons are needed for an element to be stable?
Definition
8
Term
what are the two types of chemical bonds?
Definition
ionic and covalent
Term

lewis dot diagram for a monoatomic molecule

Definition
square brackets, and electons lost in superscript.

ex: [Ca]2+
Term
ionic bonds
Definition

one or more electrons are transferred.

METALS
-gives up electrons
-becomes positive
-radius decreases

NONMETALS
-gain electrons
-becomes negative
-radius increases

[ Na ]+ [ *Cl*]-

Term
ionic properties
Definition

- based on structure
- high melting/boiling points
- high heats of fusion
- high heats of vaporization
- low vapor pressures
- conduct electric currents in liquid state.
- crystals

Term
cations
Definition
ion with positive charge
Term
anions
Definition

ion with a negative charge

Term
covalent bonds
Definition

-sharing electrons
-nonmetals react with nonmetals
* like elements can't stand next to eachother in lewis dot diagrams.*

Term
polyatomic ions.
Definition
- more than one atom
- covalently bonded
Term
ion
Definition
charged particle that has ganied or lost an electron
Term
molecules
Definition
discrete particles formed by covalently bonded atoms,
-exist in all phases.
Term
metallic substances
Definition
-few valence elctrons
-low ionization energies.
-niether ionic nor covalent bonding is possible.
-metallic bonding occurs.
-crystalline lattice [gemetric arrangment]
-"sea of electrons"
Term
atoms of non metals react with atoms of metals by
Definition

gaining electrons to form ionic compounds

Term
what bonding is present in network solids?
Definition
covalent
Term
how can you tell that a compound contains both ionic and covalent bonds?
Definition
there'll be an element to the 3rd.
Term
what type of bond is present in copper wire?
Definition
metallic
Term
bond examples

ionic
covalent
nonpolar
metallic
network
Definition
ionic- NaCl
covalent- H2O, NH3
nonpolar- I2, CO2
metallic- Cu, Mg ribbon
network- diamond, SiO2
Term
role of valence electorns in
an ionic bond-
a covalent bond-
a metallic bond-
Definition
ionic- electrons are transfered
covalent- electrons are shared
metalli- sea of electrons
Term
covalent lewis dot structures vs. ionic dot structures
Definition

covalent = circles
ionic = brackets + arrows

Supporting users have an ad free experience!